157206621 has 32 divisors (see below), whose sum is σ = 250467840. Its totient is φ = 86443200.

The previous prime is 157206613. The next prime is 157206649. The reversal of 157206621 is 126602751.

It is not a de Polignac number, because 157206621 - 2³ = 157206613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157206661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22206 + ... + 28416.

It is an arithmetic number, because the mean of its divisors is an integer number (7827120).

Almost surely, 2^157206621 is an apocalyptic number.

157206621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157206621 is a deficient number, since it is larger than the sum of its proper divisors (93261219).

157206621 is a wasteful number, since it uses less digits than its factorization.

157206621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6297.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 157206621 is about 12538.2064506850. The cubic root of 157206621 is about 539.7056248761.

The spelling of 157206621 in words is "one hundred fifty-seven million, two hundred six thousand, six hundred twenty-one".