50491881 has 24 divisors (see below), whose sum is σ = 81072576. Its totient is φ = 30020640.

The previous prime is 50491867. The next prime is 50491897. The reversal of 50491881 is 18819405.

It is not a de Polignac number, because 50491881 - 2⁵ = 50491849 is a prime.

It is a super-2 number, since 2×50491881² = 5098860093836322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50491801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 436 + ... + 10058.

It is an arithmetic number, because the mean of its divisors is an integer number (3378024).

Almost surely, 2^50491881 is an apocalyptic number.

It is an amenable number.

50491881 is a deficient number, since it is larger than the sum of its proper divisors (30580695).

50491881 is a wasteful number, since it uses less digits than its factorization.

50491881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9693 (or 9690 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 50491881 is about 7105.7639279672. The cubic root of 50491881 is about 369.6072799277.

The spelling of 50491881 in words is "fifty million, four hundred ninety-one thousand, eight hundred eighty-one".