31250443157 has 2 divisors, whose sum is σ = 31250443158. Its totient is φ = 31250443156.

The previous prime is 31250443067. The next prime is 31250443223. The reversal of 31250443157 is 75134405213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23847389476 + 7403053681 = 154426^2 + 86041^2 .

It is a cyclic number.

It is not a de Polignac number, because 31250443157 - 2¹² = 31250439061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31250443957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15625221578 + 15625221579.

It is an arithmetic number, because the mean of its divisors is an integer number (15625221579).

Almost surely, 2^31250443157 is an apocalyptic number.

It is an amenable number.

31250443157 is a deficient number, since it is larger than the sum of its proper divisors (1).

31250443157 is an equidigital number, since it uses as much as digits as its factorization.

31250443157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 31250443157 in words is "thirty-one billion, two hundred fifty million, four hundred forty-three thousand, one hundred fifty-seven".