31401362551 has 12 divisors (see below), whose sum is σ = 34510173672. Its totient is φ = 28553237856.

The previous prime is 31401362477. The next prime is 31401362561. The reversal of 31401362551 is 15526310413.

It is not a de Polignac number, because 31401362551 - 2²⁵ = 31367808119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401362561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1375296 + ... + 1397941.

It is an arithmetic number, because the mean of its divisors is an integer number (2875847806).

Almost surely, 2^31401362551 is an apocalyptic number.

31401362551 is a deficient number, since it is larger than the sum of its proper divisors (3108811121).

31401362551 is a wasteful number, since it uses less digits than its factorization.

31401362551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773330 (or 2773317 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 31401362551 its reverse (15526310413), we get a palindrome (46927672964).

The spelling of 31401362551 in words is "thirty-one billion, four hundred one million, three hundred sixty-two thousand, five hundred fifty-one".