157157201 has 2 divisors, whose sum is σ = 157157202. Its totient is φ = 157157200.

The previous prime is 157157191. The next prime is 157157207. The reversal of 157157201 is 102751751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157126225 + 30976 = 12535^2 + 176^2 .

It is an emirp because it is prime and its reverse (102751751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157157201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157157207) 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, 78578600 + 78578601.

It is an arithmetic number, because the mean of its divisors is an integer number (78578601).

Almost surely, 2^157157201 is an apocalyptic number.

It is an amenable number.

157157201 is a deficient number, since it is larger than the sum of its proper divisors (1).

157157201 is an equidigital number, since it uses as much as digits as its factorization.

157157201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2450, while the sum is 29.

The square root of 157157201 is about 12536.2355194851. The cubic root of 157157201 is about 539.6490643928.

The spelling of 157157201 in words is "one hundred fifty-seven million, one hundred fifty-seven thousand, two hundred one".