155515129 has 24 divisors (see below), whose sum is σ = 197648640. Its totient is φ = 119760960.

The previous prime is 155515103. The next prime is 155515141. The reversal of 155515129 is 921515551.

It is a happy number.

It is not a de Polignac number, because 155515129 - 2¹⁵ = 155482361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155515094 and 155515103.

It is not an unprimeable number, because it can be changed into a prime (155515159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74352 + ... + 76414.

It is an arithmetic number, because the mean of its divisors is an integer number (8235360).

Almost surely, 2^155515129 is an apocalyptic number.

It is an amenable number.

155515129 is a deficient number, since it is larger than the sum of its proper divisors (42133511).

155515129 is a wasteful number, since it uses less digits than its factorization.

155515129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181 (or 2170 counting only the distinct ones).

The product of its digits is 11250, while the sum is 34.

The square root of 155515129 is about 12470.5705162194. The cubic root of 155515129 is about 537.7629550934.

The spelling of 155515129 in words is "one hundred fifty-five million, five hundred fifteen thousand, one hundred twenty-nine".