50317821 has 16 divisors (see below), whose sum is σ = 74659200. Its totient is φ = 33493824.

The previous prime is 50317801. The next prime is 50317831. The reversal of 50317821 is 12871305.

It is not a de Polignac number, because 50317821 - 2⁵ = 50317789 is a prime.

It is a super-2 number, since 2×50317821² = 5063766220376082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50317801) 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, 26320 + ... + 28166.

It is an arithmetic number, because the mean of its divisors is an integer number (4666200).

Almost surely, 2^50317821 is an apocalyptic number.

It is an amenable number.

50317821 is a deficient number, since it is larger than the sum of its proper divisors (24341379).

50317821 is a wasteful number, since it uses less digits than its factorization.

50317821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865 (or 2859 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 50317821 is about 7093.5055508542. The cubic root of 50317821 is about 369.1820768422.

The spelling of 50317821 in words is "fifty million, three hundred seventeen thousand, eight hundred twenty-one".