31423431037 has 2 divisors, whose sum is σ = 31423431038. Its totient is φ = 31423431036.

The previous prime is 31423430959. The next prime is 31423431041. The reversal of 31423431037 is 73013432413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21671078521 + 9752352516 = 147211^2 + 98754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31423431037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31423437037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711715518 + 15711715519.

It is an arithmetic number, because the mean of its divisors is an integer number (15711715519).

Almost surely, 2^31423431037 is an apocalyptic number.

It is an amenable number.

31423431037 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423431037 is an equidigital number, since it uses as much as digits as its factorization.

31423431037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 31.

The spelling of 31423431037 in words is "thirty-one billion, four hundred twenty-three million, four hundred thirty-one thousand, thirty-seven".