155251155 has 16 divisors (see below), whose sum is σ = 251195040. Its totient is φ = 81869568.

The previous prime is 155251153. The next prime is 155251163. The reversal of 155251155 is 551152551.

It is not a de Polignac number, because 155251155 - 2¹ = 155251153 is a prime.

It is a super-2 number, since 2×155251155² = 48205842257668050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155251153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56812 + ... + 59481.

It is an arithmetic number, because the mean of its divisors is an integer number (15699690).

Almost surely, 2^155251155 is an apocalyptic number.

155251155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155251155 is a deficient number, since it is larger than the sum of its proper divisors (95943885).

155251155 is a wasteful number, since it uses less digits than its factorization.

155251155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116390.

The product of its digits is 6250, while the sum is 30.

The square root of 155251155 is about 12459.9821428443. The cubic root of 155251155 is about 537.4585134737.

The spelling of 155251155 in words is "one hundred fifty-five million, two hundred fifty-one thousand, one hundred fifty-five".