155115250 has 16 divisors (see below), whose sum is σ = 290376216. Its totient is φ = 62046000.

The previous prime is 155115241. The next prime is 155115269. The reversal of 155115250 is 52511551.

It can be written as a sum of positive squares in 4 ways, for example, as 26224641 + 128890609 = 5121^2 + 11353^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309981 + ... + 310480.

Almost surely, 2^155115250 is an apocalyptic number.

155115250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155115250 is a deficient number, since it is larger than the sum of its proper divisors (135260966).

155115250 is an equidigital number, since it uses as much as digits as its factorization.

155115250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620478 (or 620468 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 155115250 is about 12454.5272893033. The cubic root of 155115250 is about 537.3016394429.

The spelling of 155115250 in words is "one hundred fifty-five million, one hundred fifteen thousand, two hundred fifty".