31253406523 has 4 divisors (see below), whose sum is σ = 31269427648. Its totient is φ = 31237385400.

The previous prime is 31253406497. The next prime is 31253406553. The reversal of 31253406523 is 32560435213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32560435213 = 13003 ⋅2504071.

It is a cyclic number.

It is not a de Polignac number, because 31253406523 - 2⁹ = 31253406011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31253406553) 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 3 ways as a sum of consecutive naturals, for example, 8007636 + ... + 8011537.

It is an arithmetic number, because the mean of its divisors is an integer number (7817356912).

Almost surely, 2^31253406523 is an apocalyptic number.

31253406523 is a deficient number, since it is larger than the sum of its proper divisors (16021125).

31253406523 is a wasteful number, since it uses less digits than its factorization.

31253406523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16021124.

The product of its (nonzero) digits is 64800, while the sum is 34.

The spelling of 31253406523 in words is "thirty-one billion, two hundred fifty-three million, four hundred six thousand, five hundred twenty-three".