157210657 has 2 divisors, whose sum is σ = 157210658. Its totient is φ = 157210656.

The previous prime is 157210643. The next prime is 157210673. The reversal of 157210657 is 756012751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96510976 + 60699681 = 9824^2 + 7791^2 .

It is a cyclic number.

It is not a de Polignac number, because 157210657 - 2¹¹ = 157208609 is a prime.

It is not a weakly prime, because it can be changed into another prime (157210607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78605328 + 78605329.

It is an arithmetic number, because the mean of its divisors is an integer number (78605329).

Almost surely, 2^157210657 is an apocalyptic number.

It is an amenable number.

157210657 is a deficient number, since it is larger than the sum of its proper divisors (1).

157210657 is an equidigital number, since it uses as much as digits as its factorization.

157210657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 157210657 is about 12538.3673977117. The cubic root of 157210657 is about 539.7102434968.

The spelling of 157210657 in words is "one hundred fifty-seven million, two hundred ten thousand, six hundred fifty-seven".