1256525232531 has 8 divisors (see below), whose sum is σ = 1716229586064. Its totient is φ = 817252183680.

The previous prime is 1256525232463. The next prime is 1256525232533. The reversal of 1256525232531 is 1352325256521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1256525232531 is a prime.

It is a super-2 number, since 2×1256525232531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1256525232533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5107826026 + ... + 5107826271.

It is an arithmetic number, because the mean of its divisors is an integer number (214528698258).

Almost surely, 2^{1256525232531} is an apocalyptic number.

1256525232531 is a deficient number, since it is larger than the sum of its proper divisors (459704353533).

1256525232531 is a wasteful number, since it uses less digits than its factorization.

1256525232531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215652341.

The product of its digits is 540000, while the sum is 42.

The spelling of 1256525232531 in words is "one trillion, two hundred fifty-six billion, five hundred twenty-five million, two hundred thirty-two thousand, five hundred thirty-one".