500221157 has 2 divisors, whose sum is σ = 500221158. Its totient is φ = 500221156.

The previous prime is 500221153. The next prime is 500221171. The reversal of 500221157 is 751122005.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499701316 + 519841 = 22354^2 + 721^2 .

It is a cyclic number.

It is not a de Polignac number, because 500221157 - 2² = 500221153 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500221153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250110578 + 250110579.

It is an arithmetic number, because the mean of its divisors is an integer number (250110579).

Almost surely, 2^500221157 is an apocalyptic number.

It is an amenable number.

500221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

500221157 is an equidigital number, since it uses as much as digits as its factorization.

500221157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 500221157 is about 22365.6244491407. The cubic root of 500221157 is about 793.8175303531.

The spelling of 500221157 in words is "five hundred million, two hundred twenty-one thousand, one hundred fifty-seven".