505549157 has 2 divisors, whose sum is σ = 505549158. Its totient is φ = 505549156.

The previous prime is 505549153. The next prime is 505549183. The reversal of 505549157 is 751945505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288694081 + 216855076 = 16991^2 + 14726^2 .

It is a cyclic number.

It is not a de Polignac number, because 505549157 - 2² = 505549153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505549153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252774578 + 252774579.

It is an arithmetic number, because the mean of its divisors is an integer number (252774579).

Almost surely, 2^505549157 is an apocalyptic number.

It is an amenable number.

505549157 is a deficient number, since it is larger than the sum of its proper divisors (1).

505549157 is an equidigital number, since it uses as much as digits as its factorization.

505549157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157500, while the sum is 41.

The square root of 505549157 is about 22484.4203171885. The cubic root of 505549157 is about 796.6259758944.

The spelling of 505549157 in words is "five hundred five million, five hundred forty-nine thousand, one hundred fifty-seven".