50013531 has 12 divisors (see below), whose sum is σ = 74917752. Its totient is φ = 33342192.

The previous prime is 50013517. The next prime is 50013547. The reversal of 50013531 is 13531005.

It is a happy number.

50013531 is a `hidden beast` number, since 500 + 135 + 31 = 666.

It is not a de Polignac number, because 50013531 - 2²² = 45819227 is a prime.

It is a super-2 number, since 2×50013531² = 5002706566175922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50013511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102666 + ... + 103151.

It is an arithmetic number, because the mean of its divisors is an integer number (6243146).

Almost surely, 2^50013531 is an apocalyptic number.

50013531 is a deficient number, since it is larger than the sum of its proper divisors (24904221).

50013531 is an equidigital number, since it uses as much as digits as its factorization.

50013531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205832 (or 205820 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 50013531 is about 7072.0245333285. The cubic root of 50013531 is about 368.4363792868.

Adding to 50013531 its reverse (13531005), we get a palindrome (63544536).

The spelling of 50013531 in words is "fifty million, thirteen thousand, five hundred thirty-one".