50661531 has 10 divisors (see below), whose sum is σ = 75679692. Its totient is φ = 33774300.

The previous prime is 50661529. The next prime is 50661539. The reversal of 50661531 is 13516605.

It is a happy number.

50661531 is a `hidden beast` number, since 506 + 6 + 153 + 1 = 666.

It is not a de Polignac number, because 50661531 - 2¹ = 50661529 is a prime.

It is a super-2 number, since 2×50661531² = 5133181446527922, 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 = 50661495 and 50661504.

It is not an unprimeable number, because it can be changed into a prime (50661539) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 312645 + ... + 312806.

Almost surely, 2^50661531 is an apocalyptic number.

50661531 is a deficient number, since it is larger than the sum of its proper divisors (25018161).

50661531 is an equidigital number, since it uses as much as digits as its factorization.

50661531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625463 (or 625454 counting only the distinct ones).

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

The square root of 50661531 is about 7117.6914094389. The cubic root of 50661531 is about 370.0207706869.

The spelling of 50661531 in words is "fifty million, six hundred sixty-one thousand, five hundred thirty-one".