50021157 has 16 divisors (see below), whose sum is σ = 70943040. Its totient is φ = 31241472.

The previous prime is 50021149. The next prime is 50021173. The reversal of 50021157 is 75112005.

It is not a de Polignac number, because 50021157 - 2³ = 50021149 is a prime.

It is a super-2 number, since 2×50021157² = 5004232295237298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50021177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9538 + ... + 13820.

It is an arithmetic number, because the mean of its divisors is an integer number (4433940).

Almost surely, 2^50021157 is an apocalyptic number.

It is an amenable number.

50021157 is a deficient number, since it is larger than the sum of its proper divisors (20921883).

50021157 is a wasteful number, since it uses less digits than its factorization.

50021157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 50021157 is about 7072.5636794588. The cubic root of 50021157 is about 368.4551045730.

The spelling of 50021157 in words is "fifty million, twenty-one thousand, one hundred fifty-seven".