155109137 has 2 divisors, whose sum is σ = 155109138. Its totient is φ = 155109136.

The previous prime is 155109133. The next prime is 155109223. The reversal of 155109137 is 731901551.

It is a happy number.

155109137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86285521 + 68823616 = 9289^2 + 8296^2 .

It is a cyclic number.

It is not a de Polignac number, because 155109137 - 2² = 155109133 is a prime.

It is not a weakly prime, because it can be changed into another prime (155109131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77554568 + 77554569.

It is an arithmetic number, because the mean of its divisors is an integer number (77554569).

Almost surely, 2^155109137 is an apocalyptic number.

It is an amenable number.

155109137 is a deficient number, since it is larger than the sum of its proper divisors (1).

155109137 is an equidigital number, since it uses as much as digits as its factorization.

155109137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4725, while the sum is 32.

The square root of 155109137 is about 12454.2818741186. The cubic root of 155109137 is about 537.2945811039.

The spelling of 155109137 in words is "one hundred fifty-five million, one hundred nine thousand, one hundred thirty-seven".