31124982561 has 8 divisors (see below), whose sum is σ = 41530474464. Its totient is φ = 20734739520.

The previous prime is 31124982557. The next prime is 31124982583. The reversal of 31124982561 is 16528942113.

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

It is not a de Polignac number, because 31124982561 - 2² = 31124982557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31124982061) 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, 3807451 + ... + 3815616.

It is an arithmetic number, because the mean of its divisors is an integer number (5191309308).

Almost surely, 2^31124982561 is an apocalyptic number.

It is an amenable number.

31124982561 is a deficient number, since it is larger than the sum of its proper divisors (10405491903).

31124982561 is a wasteful number, since it uses less digits than its factorization.

31124982561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7624431.

The product of its digits is 103680, while the sum is 42.

The spelling of 31124982561 in words is "thirty-one billion, one hundred twenty-four million, nine hundred eighty-two thousand, five hundred sixty-one".