50131665 has 12 divisors (see below), whose sum is σ = 86894964. Its totient is φ = 26736864.

The previous prime is 50131639. The next prime is 50131667. The reversal of 50131665 is 56613105.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30338064 + 19793601 = 5508^2 + 4449^2 .

It is not a de Polignac number, because 50131665 - 2⁷ = 50131537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50131667) 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, 556974 + ... + 557063.

It is an arithmetic number, because the mean of its divisors is an integer number (7241247).

Almost surely, 2^50131665 is an apocalyptic number.

It is an amenable number.

50131665 is a deficient number, since it is larger than the sum of its proper divisors (36763299).

50131665 is a wasteful number, since it uses less digits than its factorization.

50131665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114048 (or 1114045 counting only the distinct ones).

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

The square root of 50131665 is about 7080.3718122709. The cubic root of 50131665 is about 368.7262384382.

The spelling of 50131665 in words is "fifty million, one hundred thirty-one thousand, six hundred sixty-five".