50531661 has 8 divisors (see below), whose sum is σ = 74861760. Its totient is φ = 33687756.

The previous prime is 50531647. The next prime is 50531669. The reversal of 50531661 is 16613505.

It is a happy number.

It is not a de Polignac number, because 50531661 - 2⁵ = 50531629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1871543 = 50531661 / (5 + 0 + 5 + 3 + 1 + 6 + 6 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50531669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935745 + ... + 935798.

It is an arithmetic number, because the mean of its divisors is an integer number (9357720).

Almost surely, 2^50531661 is an apocalyptic number.

It is an amenable number.

50531661 is a deficient number, since it is larger than the sum of its proper divisors (24330099).

50531661 is a wasteful number, since it uses less digits than its factorization.

50531661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871552 (or 1871546 counting only the distinct ones).

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

The square root of 50531661 is about 7108.5625129136. The cubic root of 50531661 is about 369.7043194104.

The spelling of 50531661 in words is "fifty million, five hundred thirty-one thousand, six hundred sixty-one".