31372590405 has 16 divisors (see below), whose sum is σ = 54057386880. Its totient is φ = 15444967488.

The previous prime is 31372590401. The next prime is 31372590419. The reversal of 31372590405 is 50409527313.

It is a happy number.

It is not a de Polignac number, because 31372590405 - 2² = 31372590401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31372590401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80442345 + ... + 80442734.

It is an arithmetic number, because the mean of its divisors is an integer number (3378586680).

Almost surely, 2^31372590405 is an apocalyptic number.

It is an amenable number.

31372590405 is a deficient number, since it is larger than the sum of its proper divisors (22684796475).

31372590405 is a wasteful number, since it uses less digits than its factorization.

31372590405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160885100.

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 31372590405 in words is "thirty-one billion, three hundred seventy-two million, five hundred ninety thousand, four hundred five".