31100899957 has 4 divisors (see below), whose sum is σ = 31106315500. Its totient is φ = 31095484416.

The previous prime is 31100899933. The next prime is 31100899981. The reversal of 31100899957 is 75999800113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (31100899933) and next prime (31100899981).

It can be written as a sum of positive squares in 2 ways, for example, as 959078961 + 30141820996 = 30969^2 + 173614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31100899957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100899997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2699148 + ... + 2710645.

It is an arithmetic number, because the mean of its divisors is an integer number (7776578875).

Almost surely, 2^31100899957 is an apocalyptic number.

It is an amenable number.

31100899957 is a deficient number, since it is larger than the sum of its proper divisors (5415543).

31100899957 is an equidigital number, since it uses as much as digits as its factorization.

31100899957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5415542.

The product of its (nonzero) digits is 612360, while the sum is 52.

The spelling of 31100899957 in words is "thirty-one billion, one hundred million, eight hundred ninety-nine thousand, nine hundred fifty-seven".