50421157 has 2 divisors, whose sum is σ = 50421158. Its totient is φ = 50421156.

The previous prime is 50421149. The next prime is 50421181. The reversal of 50421157 is 75112405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44275716 + 6145441 = 6654^2 + 2479^2 .

It is a cyclic number.

It is not a de Polignac number, because 50421157 - 2³ = 50421149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50421127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25210578 + 25210579.

It is an arithmetic number, because the mean of its divisors is an integer number (25210579).

Almost surely, 2^50421157 is an apocalyptic number.

It is an amenable number.

50421157 is a deficient number, since it is larger than the sum of its proper divisors (1).

50421157 is an equidigital number, since it uses as much as digits as its factorization.

50421157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 50421157 is about 7100.7856607561. The cubic root of 50421157 is about 369.4346295988.

The spelling of 50421157 in words is "fifty million, four hundred twenty-one thousand, one hundred fifty-seven".