31061249437 has 2 divisors, whose sum is σ = 31061249438. Its totient is φ = 31061249436.

The previous prime is 31061249413. The next prime is 31061249539. The reversal of 31061249437 is 73494216013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29670407001 + 1390842436 = 172251^2 + 37294^2 .

It is a cyclic number.

It is not a de Polignac number, because 31061249437 - 2²³ = 31052860829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31061249437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31061249137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15530624718 + 15530624719.

It is an arithmetic number, because the mean of its divisors is an integer number (15530624719).

Almost surely, 2^31061249437 is an apocalyptic number.

It is an amenable number.

31061249437 is a deficient number, since it is larger than the sum of its proper divisors (1).

31061249437 is an equidigital number, since it uses as much as digits as its factorization.

31061249437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 31061249437 in words is "thirty-one billion, sixty-one million, two hundred forty-nine thousand, four hundred thirty-seven".