50561631 has 16 divisors (see below), whose sum is σ = 75458400. Its totient is φ = 33459264.

The previous prime is 50561627. The next prime is 50561633. The reversal of 50561631 is 13616505.

It is a happy number.

It is not a de Polignac number, because 50561631 - 2² = 50561627 is a prime.

It is a super-2 number, since 2×50561631² = 5112957058760322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 50561595 and 50561604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50561633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3136 + ... + 10533.

It is an arithmetic number, because the mean of its divisors is an integer number (4716150).

Almost surely, 2^50561631 is an apocalyptic number.

50561631 is a deficient number, since it is larger than the sum of its proper divisors (24896769).

50561631 is a wasteful number, since it uses less digits than its factorization.

50561631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13815 (or 13809 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 50561631 is about 7110.6702215755. The cubic root of 50561631 is about 369.7773947092. Note that the first 3 decimals are identical.

The spelling of 50561631 in words is "fifty million, five hundred sixty-one thousand, six hundred thirty-one".