50511231 has 12 divisors (see below), whose sum is σ = 73095880. Its totient is φ = 33611760.

The previous prime is 50511203. The next prime is 50511259. The reversal of 50511231 is 13211505.

It is an interprime number because it is at equal distance from previous prime (50511203) and next prime (50511259).

It is not a de Polignac number, because 50511231 - 2⁷ = 50511103 is a prime.

It is a super-2 number, since 2×50511231² = 5102768914270722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50511271) 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, 225 + ... + 10053.

Almost surely, 2^50511231 is an apocalyptic number.

50511231 is a deficient number, since it is larger than the sum of its proper divisors (22584649).

50511231 is a wasteful number, since it uses less digits than its factorization.

50511231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10406 (or 10403 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 50511231 is about 7107.1253682484. The cubic root of 50511231 is about 369.6544887549.

Adding to 50511231 its reverse (13211505), we get a palindrome (63722736).

The spelling of 50511231 in words is "fifty million, five hundred eleven thousand, two hundred thirty-one".