1531350313 has 4 divisors (see below), whose sum is σ = 1531834000. Its totient is φ = 1530866628.

The previous prime is 1531350311. The next prime is 1531350323. The reversal of 1531350313 is 3130531351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3130531351 = 17 ⋅184148903.

It is a cyclic number.

It is not a de Polignac number, because 1531350313 - 2¹ = 1531350311 is a prime.

It is a super-2 number, since 2×1531350313² = 4690067562250395938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1531350311) 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, 237063 + ... + 243436.

It is an arithmetic number, because the mean of its divisors is an integer number (382958500).

Almost surely, 2^1531350313 is an apocalyptic number.

It is an amenable number.

1531350313 is a deficient number, since it is larger than the sum of its proper divisors (483687).

1531350313 is an equidigital number, since it uses as much as digits as its factorization.

1531350313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483686.

The product of its (nonzero) digits is 2025, while the sum is 25.

The square root of 1531350313 is about 39132.4713377522. The cubic root of 1531350313 is about 1152.6342418090.

Adding to 1531350313 its reverse (3130531351), we get a palindrome (4661881664).

The spelling of 1531350313 in words is "one billion, five hundred thirty-one million, three hundred fifty thousand, three hundred thirteen".