157011215 has 4 divisors (see below), whose sum is σ = 188413464. Its totient is φ = 125608968.

The previous prime is 157011209. The next prime is 157011227. The reversal of 157011215 is 512110751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157011215 - 2²⁴ = 140233999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15701117 + ... + 15701126.

It is an arithmetic number, because the mean of its divisors is an integer number (47103366).

Almost surely, 2^157011215 is an apocalyptic number.

157011215 is a deficient number, since it is larger than the sum of its proper divisors (31402249).

157011215 is an equidigital number, since it uses as much as digits as its factorization.

157011215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31402248.

The product of its (nonzero) digits is 350, while the sum is 23.

The square root of 157011215 is about 12530.4116053704. The cubic root of 157011215 is about 539.4819162249.

Adding to 157011215 its reverse (512110751), we get a palindrome (669121966).

The spelling of 157011215 in words is "one hundred fifty-seven million, eleven thousand, two hundred fifteen".