631500157 has 2 divisors, whose sum is σ = 631500158. Its totient is φ = 631500156.

The previous prime is 631500137. The next prime is 631500179. The reversal of 631500157 is 751005136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489913956 + 141586201 = 22134^2 + 11899^2 .

It is a cyclic number.

It is not a de Polignac number, because 631500157 - 2¹⁹ = 630975869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631500137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315750078 + 315750079.

It is an arithmetic number, because the mean of its divisors is an integer number (315750079).

Almost surely, 2^631500157 is an apocalyptic number.

It is an amenable number.

631500157 is a deficient number, since it is larger than the sum of its proper divisors (1).

631500157 is an equidigital number, since it uses as much as digits as its factorization.

631500157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 631500157 is about 25129.6668700562. Note that the first 3 decimals coincide. The cubic root of 631500157 is about 857.9417866478.

The spelling of 631500157 in words is "six hundred thirty-one million, five hundred thousand, one hundred fifty-seven".