157216601 has 2 divisors, whose sum is σ = 157216602. Its totient is φ = 157216600.

The previous prime is 157216559. The next prime is 157216607. The reversal of 157216601 is 106612751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156850576 + 366025 = 12524^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 157216601 - 2²² = 153022297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157216607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78608300 + 78608301.

It is an arithmetic number, because the mean of its divisors is an integer number (78608301).

Almost surely, 2^157216601 is an apocalyptic number.

It is an amenable number.

157216601 is a deficient number, since it is larger than the sum of its proper divisors (1).

157216601 is an equidigital number, since it uses as much as digits as its factorization.

157216601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 157216601 is about 12538.6044279258. The cubic root of 157216601 is about 539.7170454048.

It can be divided in two parts, 15721 and 6601, that added together give a palindrome (22322).

The spelling of 157216601 in words is "one hundred fifty-seven million, two hundred sixteen thousand, six hundred one".