50921631 has 12 divisors (see below), whose sum is σ = 75348000. Its totient is φ = 33119520.

The previous prime is 50921603. The next prime is 50921659. The reversal of 50921631 is 13612905.

50921631 is a `hidden beast` number, since 5 + 0 + 9 + 21 + 631 = 666.

It is an interprime number because it is at equal distance from previous prime (50921603) and next prime (50921659).

It is not a de Polignac number, because 50921631 - 2¹⁵ = 50888863 is a prime.

It is a super-2 number, since 2×50921631² = 5186025007400322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 50921595 and 50921604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50921671) 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, 68631 + ... + 69368.

It is an arithmetic number, because the mean of its divisors is an integer number (6279000).

Almost surely, 2^50921631 is an apocalyptic number.

50921631 is a deficient number, since it is larger than the sum of its proper divisors (24426369).

50921631 is a wasteful number, since it uses less digits than its factorization.

50921631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138046 (or 138043 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 50921631 is about 7135.9393915588. The cubic root of 50921631 is about 370.6529279574.

The spelling of 50921631 in words is "fifty million, nine hundred twenty-one thousand, six hundred thirty-one".