31143234037 has 2 divisors, whose sum is σ = 31143234038. Its totient is φ = 31143234036.

The previous prime is 31143233923. The next prime is 31143234061. The reversal of 31143234037 is 73043234113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24790187601 + 6353046436 = 157449^2 + 79706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31143234037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31143234097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571617018 + 15571617019.

It is an arithmetic number, because the mean of its divisors is an integer number (15571617019).

Almost surely, 2^31143234037 is an apocalyptic number.

It is an amenable number.

31143234037 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143234037 is an equidigital number, since it uses as much as digits as its factorization.

31143234037 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 31143234037 in words is "thirty-one billion, one hundred forty-three million, two hundred thirty-four thousand, thirty-seven".