1000520131 has 4 divisors (see below), whose sum is σ = 1077483232. Its totient is φ = 923557032.

The previous prime is 1000520113. The next prime is 1000520137. The reversal of 1000520131 is 1310250001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1310250001 = 139 ⋅9426259.

It is a cyclic number.

It is not a de Polignac number, because 1000520131 - 2⁵ = 1000520099 is a prime.

It is a super-2 number, since 2×1000520131² = 2002081065072514322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 76963087 = 1000520131 / (1 + 0 + 0 + 0 + 5 + 2 + 0 + 1 + 3 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000520137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38481531 + ... + 38481556.

It is an arithmetic number, because the mean of its divisors is an integer number (269370808).

Almost surely, 2^1000520131 is an apocalyptic number.

1000520131 is a deficient number, since it is larger than the sum of its proper divisors (76963101).

1000520131 is an equidigital number, since it uses as much as digits as its factorization.

1000520131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76963100.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1000520131 is about 31630.9995257817. Note that the first 3 decimals coincide. The cubic root of 1000520131 is about 1000.1733469491.

Adding to 1000520131 its product of nonzero digits (30), we get a square (1000520161 = 31631²).

Adding to 1000520131 its reverse (1310250001), we get a palindrome (2310770132).

The spelling of 1000520131 in words is "one billion, five hundred twenty thousand, one hundred thirty-one".