1312353531 has 6 divisors (see below), whose sum is σ = 1895621780. Its totient is φ = 874902348.

The previous prime is 1312353529. The next prime is 1312353557. The reversal of 1312353531 is 1353532131.

1312353531 is a `hidden beast` number, since 1 + 3 + 123 + 5 + 3 + 531 = 666.

It is not a de Polignac number, because 1312353531 - 2¹ = 1312353529 is a prime.

It is a super-2 number, since 2×1312353531² = 3444543580656335922, 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 = 1312353495 and 1312353504.

It is not an unprimeable number, because it can be changed into a prime (1312333531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72908521 + ... + 72908538.

Almost surely, 2^1312353531 is an apocalyptic number.

1312353531 is a deficient number, since it is larger than the sum of its proper divisors (583268249).

1312353531 is a wasteful number, since it uses less digits than its factorization.

1312353531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145817065 (or 145817062 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 1312353531 is about 36226.4203448257. The cubic root of 1312353531 is about 1094.8390555973.

Adding to 1312353531 its reverse (1353532131), we get a palindrome (2665885662).

The spelling of 1312353531 in words is "one billion, three hundred twelve million, three hundred fifty-three thousand, five hundred thirty-one".