50255721 has 10 divisors (see below), whose sum is σ = 75073482. Its totient is φ = 33503760.

The previous prime is 50255707. The next prime is 50255749. The reversal of 50255721 is 12755205.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28772496 + 21483225 = 5364^2 + 4635^2 .

It is not a de Polignac number, because 50255721 - 2¹⁰ = 50254697 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (50255701) 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, 310140 + ... + 310301.

Almost surely, 2^50255721 is an apocalyptic number.

It is an amenable number.

50255721 is a deficient number, since it is larger than the sum of its proper divisors (24817761).

50255721 is an equidigital number, since it uses as much as digits as its factorization.

50255721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620453 (or 620444 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 50255721 is about 7089.1269561209. The cubic root of 50255721 is about 369.0301383276.

The spelling of 50255721 in words is "fifty million, two hundred fifty-five thousand, seven hundred twenty-one".