50155621 has 4 divisors (see below), whose sum is σ = 50436000. Its totient is φ = 49875244.

The previous prime is 50155591. The next prime is 50155631. The reversal of 50155621 is 12655105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50155621 - 2⁷ = 50155493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50155631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139921 + ... + 140278.

It is an arithmetic number, because the mean of its divisors is an integer number (12609000).

Almost surely, 2^50155621 is an apocalyptic number.

It is an amenable number.

50155621 is a deficient number, since it is larger than the sum of its proper divisors (280379).

50155621 is a wasteful number, since it uses less digits than its factorization.

50155621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280378.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 50155621 is about 7082.0633292848. The cubic root of 50155621 is about 368.7849624611.

The spelling of 50155621 in words is "fifty million, one hundred fifty-five thousand, six hundred twenty-one".