157110821 has 16 divisors (see below), whose sum is σ = 196254720. Its totient is φ = 122653440.

The previous prime is 157110809. The next prime is 157110823. The reversal of 157110821 is 128011751.

It is not a de Polignac number, because 157110821 - 2⁶ = 157110757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157110823) 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 in 15 ways as a sum of consecutive naturals, for example, 17606 + ... + 24983.

It is an arithmetic number, because the mean of its divisors is an integer number (12265920).

Almost surely, 2^157110821 is an apocalyptic number.

It is an amenable number.

157110821 is a deficient number, since it is larger than the sum of its proper divisors (39143899).

157110821 is a wasteful number, since it uses less digits than its factorization.

157110821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42644.

The product of its (nonzero) digits is 560, while the sum is 26.

The square root of 157110821 is about 12534.3855453708. The cubic root of 157110821 is about 539.5959723592.

The spelling of 157110821 in words is "one hundred fifty-seven million, one hundred ten thousand, eight hundred twenty-one".