50513391 has 12 divisors (see below), whose sum is σ = 74516832. Its totient is φ = 32958816.

The previous prime is 50513387. The next prime is 50513413. The reversal of 50513391 is 19331505.

It is not a de Polignac number, because 50513391 - 2² = 50513387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50513321) 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, 59286 + ... + 60131.

It is an arithmetic number, because the mean of its divisors is an integer number (6209736).

Almost surely, 2^50513391 is an apocalyptic number.

50513391 is a deficient number, since it is larger than the sum of its proper divisors (24003441).

50513391 is a wasteful number, since it uses less digits than its factorization.

50513391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119470 (or 119467 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 27.

The square root of 50513391 is about 7107.2773267968. The cubic root of 50513391 is about 369.6597578294.

Adding to 50513391 its reverse (19331505), we get a palindrome (69844896).

The spelling of 50513391 in words is "fifty million, five hundred thirteen thousand, three hundred ninety-one".