31123532493 has 24 divisors (see below), whose sum is σ = 48613488768. Its totient is φ = 19112986752.

The previous prime is 31123532491. The next prime is 31123532497. The reversal of 31123532493 is 39423532113.

31123532493 is a `hidden beast` number, since 3 + 11 + 23 + 532 + 4 + 93 = 666.

It is not a de Polignac number, because 31123532493 - 2¹ = 31123532491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123532491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2156871 + ... + 2171252.

It is an arithmetic number, because the mean of its divisors is an integer number (2025562032).

Almost surely, 2^31123532493 is an apocalyptic number.

It is an amenable number.

31123532493 is a deficient number, since it is larger than the sum of its proper divisors (17489956275).

31123532493 is a wasteful number, since it uses less digits than its factorization.

31123532493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328193 (or 4328190 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The spelling of 31123532493 in words is "thirty-one billion, one hundred twenty-three million, five hundred thirty-two thousand, four hundred ninety-three".