31358106551 has 24 divisors (see below), whose sum is σ = 35958345120. Its totient is φ = 27256689152.

The previous prime is 31358106509. The next prime is 31358106601. The reversal of 31358106551 is 15560185313.

It is a de Polignac number, because none of the positive numbers 2^k-31358106551 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 (31358106851) 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, 111425 + ... + 274101.

It is an arithmetic number, because the mean of its divisors is an integer number (1498264380).

Almost surely, 2^31358106551 is an apocalyptic number.

31358106551 is a deficient number, since it is larger than the sum of its proper divisors (4600238569).

31358106551 is a wasteful number, since it uses less digits than its factorization.

31358106551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162763 (or 162746 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 31358106551 in words is "thirty-one billion, three hundred fifty-eight million, one hundred six thousand, five hundred fifty-one".