157211565 has 16 divisors (see below), whose sum is σ = 287472768. Its totient is φ = 71868096.

The previous prime is 157211543. The next prime is 157211599. The reversal of 157211565 is 565112751.

It is a happy number.

It is not a de Polignac number, because 157211565 - 2⁷ = 157211437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 748522 + ... + 748731.

It is an arithmetic number, because the mean of its divisors is an integer number (17967048).

Almost surely, 2^157211565 is an apocalyptic number.

157211565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157211565 is a deficient number, since it is larger than the sum of its proper divisors (130261203).

157211565 is a wasteful number, since it uses less digits than its factorization.

157211565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497268.

The product of its digits is 10500, while the sum is 33.

The square root of 157211565 is about 12538.4036065202. The cubic root of 157211565 is about 539.7112825612.

The spelling of 157211565 in words is "one hundred fifty-seven million, two hundred eleven thousand, five hundred sixty-five".