520142131 has 4 divisors (see below), whose sum is σ = 521185000. Its totient is φ = 519099264.

The previous prime is 520142123. The next prime is 520142143. The reversal of 520142131 is 131241025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520142131 - 2³ = 520142123 is a prime.

It is a super-2 number, since 2×520142131² = 541095672882442322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520142099 and 520142108.

It is not an unprimeable number, because it can be changed into a prime (520142101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520686 + ... + 521683.

It is an arithmetic number, because the mean of its divisors is an integer number (130296250).

Almost surely, 2^520142131 is an apocalyptic number.

520142131 is a deficient number, since it is larger than the sum of its proper divisors (1042869).

520142131 is a wasteful number, since it uses less digits than its factorization.

520142131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042868.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 520142131 is about 22806.6247173930. The cubic root of 520142131 is about 804.2184103991.

Adding to 520142131 its reverse (131241025), we get a palindrome (651383156).

It can be divided in two parts, 52014 and 2131, that added together give a palindrome (54145).

The spelling of 520142131 in words is "five hundred twenty million, one hundred forty-two thousand, one hundred thirty-one".