50513920 has 48 divisors (see below), whose sum is σ = 121228380. Its totient is φ = 20201472.

The previous prime is 50513891. The next prime is 50513921. The reversal of 50513920 is 2931505.

It can be written as a sum of positive squares in 2 ways, for example, as 49112064 + 1401856 = 7008^2 + 1184^2 .

It is a super-2 number, since 2×50513920² = 5103312227532800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50513921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7774 + ... + 12706.

Almost surely, 2^50513920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50513920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60614190).

50513920 is an abundant number, since it is smaller than the sum of its proper divisors (70714460).

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

50513920 is an equidigital number, since it uses as much as digits as its factorization.

50513920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4960 (or 4940 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 50513920 is about 7107.3145420756. The cubic root of 50513920 is about 369.6610482419.

The spelling of 50513920 in words is "fifty million, five hundred thirteen thousand, nine hundred twenty".