155613137 has 2 divisors, whose sum is σ = 155613138. Its totient is φ = 155613136.

The previous prime is 155613127. The next prime is 155613169. The reversal of 155613137 is 731316551.

It is an a-pointer prime, because the next prime (155613169) can be obtained adding 155613137 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97792321 + 57820816 = 9889^2 + 7604^2 .

It is a cyclic number.

It is not a de Polignac number, because 155613137 - 2⁸ = 155612881 is a prime.

It is not a weakly prime, because it can be changed into another prime (155613127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77806568 + 77806569.

It is an arithmetic number, because the mean of its divisors is an integer number (77806569).

Almost surely, 2^155613137 is an apocalyptic number.

It is an amenable number.

155613137 is a deficient number, since it is larger than the sum of its proper divisors (1).

155613137 is an equidigital number, since it uses as much as digits as its factorization.

155613137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450, while the sum is 32.

The square root of 155613137 is about 12474.4994689166. The cubic root of 155613137 is about 537.8759001685.

Adding to 155613137 its reverse (731316551), we get a palindrome (886929688).

The spelling of 155613137 in words is "one hundred fifty-five million, six hundred thirteen thousand, one hundred thirty-seven".