31371457028 has 6 divisors (see below), whose sum is σ = 54900049806. Its totient is φ = 15685728512.

The previous prime is 31371457021. The next prime is 31371457081. The reversal of 31371457028 is 82075417313.

It can be written as a sum of positive squares in only one way, i.e., 31336788484 + 34668544 = 177022^2 + 5888^2 .

It is not an unprimeable number, because it can be changed into a prime (31371457021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921432125 + ... + 3921432132.

It is an arithmetic number, because the mean of its divisors is an integer number (9150008301).

Almost surely, 2^31371457028 is an apocalyptic number.

It is an amenable number.

31371457028 is a deficient number, since it is larger than the sum of its proper divisors (23528592778).

31371457028 is a wasteful number, since it uses less digits than its factorization.

31371457028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7842864261 (or 7842864259 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 31371457028 in words is "thirty-one billion, three hundred seventy-one million, four hundred fifty-seven thousand, twenty-eight".