50121520 has 20 divisors (see below), whose sum is σ = 116532720. Its totient is φ = 20048576.

The previous prime is 50121481. The next prime is 50121529. The reversal of 50121520 is 2512105.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×50121520² = 5024333534220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 50121494 and 50121503.

It is not an unprimeable number, because it can be changed into a prime (50121529) 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, 313180 + ... + 313339.

It is an arithmetic number, because the mean of its divisors is an integer number (5826636).

Almost surely, 2^50121520 is an apocalyptic number.

It is an amenable number.

50121520 is an abundant number, since it is smaller than the sum of its proper divisors (66411200).

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

50121520 is a wasteful number, since it uses less digits than its factorization.

50121520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626532 (or 626526 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 50121520 is about 7079.6553588434. The cubic root of 50121520 is about 368.7013640729.

Adding to 50121520 its reverse (2512105), we get a palindrome (52633625).

The spelling of 50121520 in words is "fifty million, one hundred twenty-one thousand, five hundred twenty".