50157561 has 4 divisors (see below), whose sum is σ = 66876752. Its totient is φ = 33438372.

The previous prime is 50157553. The next prime is 50157563. The reversal of 50157561 is 16575105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 50157561 - 2³ = 50157553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50157563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8359591 + ... + 8359596.

It is an arithmetic number, because the mean of its divisors is an integer number (16719188).

Almost surely, 2^50157561 is an apocalyptic number.

It is an amenable number.

50157561 is a deficient number, since it is larger than the sum of its proper divisors (16719191).

50157561 is a wasteful number, since it uses less digits than its factorization.

50157561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16719190.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 50157561 is about 7082.2002936940. The cubic root of 50157561 is about 368.7897172196.

The spelling of 50157561 in words is "fifty million, one hundred fifty-seven thousand, five hundred sixty-one".