50021172 has 48 divisors (see below), whose sum is σ = 134164800. Its totient is φ = 16097760.

The previous prime is 50021149. The next prime is 50021173. The reversal of 50021172 is 27112005.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50021173) 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, 4854 + ... + 11117.

It is an arithmetic number, because the mean of its divisors is an integer number (2795100).

Almost surely, 2^50021172 is an apocalyptic number.

It is an amenable number.

50021172 is an abundant number, since it is smaller than the sum of its proper divisors (84143628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50021172 is a wasteful number, since it uses less digits than its factorization.

50021172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16013 (or 16005 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 50021172 is about 7072.5647398946. The cubic root of 50021172 is about 368.4551414029.

Adding to 50021172 its reverse (27112005), we get a palindrome (77133177).

The spelling of 50021172 in words is "fifty million, twenty-one thousand, one hundred seventy-two".