50172516 has 18 divisors (see below), whose sum is σ = 126825062. Its totient is φ = 16724160.

The previous prime is 50172511. The next prime is 50172517. The reversal of 50172516 is 61527105.

It can be written as a sum of positive squares in only one way, i.e., 44836416 + 5336100 = 6696^2 + 2310^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 50172516.

It is not an unprimeable number, because it can be changed into a prime (50172511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 696805 + ... + 696876.

Almost surely, 2^50172516 is an apocalyptic number.

It is an amenable number.

50172516 is an abundant number, since it is smaller than the sum of its proper divisors (76652546).

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

50172516 is a wasteful number, since it uses less digits than its factorization.

50172516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393691 (or 1393686 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 50172516 is about 7083.2560309507. The cubic root of 50172516 is about 368.8263664111.

The spelling of 50172516 in words is "fifty million, one hundred seventy-two thousand, five hundred sixteen".