155057137 has 2 divisors, whose sum is σ = 155057138. Its totient is φ = 155057136.

The previous prime is 155057129. The next prime is 155057159. The reversal of 155057137 is 731750551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84345856 + 70711281 = 9184^2 + 8409^2 .

It is a cyclic number.

It is not a de Polignac number, because 155057137 - 2³ = 155057129 is a prime.

It is not a weakly prime, because it can be changed into another prime (155057107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77528568 + 77528569.

It is an arithmetic number, because the mean of its divisors is an integer number (77528569).

Almost surely, 2^155057137 is an apocalyptic number.

It is an amenable number.

155057137 is a deficient number, since it is larger than the sum of its proper divisors (1).

155057137 is an equidigital number, since it uses as much as digits as its factorization.

155057137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18375, while the sum is 34.

The square root of 155057137 is about 12452.1940636982. The cubic root of 155057137 is about 537.2345321140.

The spelling of 155057137 in words is "one hundred fifty-five million, fifty-seven thousand, one hundred thirty-seven".