131551155 has 32 divisors (see below), whose sum is σ = 246182400. Its totient is φ = 66466656.

The previous prime is 131551153. The next prime is 131551171. The reversal of 131551155 is 551155131.

It is not a de Polignac number, because 131551155 - 2¹ = 131551153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (131551153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23079 + ... + 28208.

It is an arithmetic number, because the mean of its divisors is an integer number (7693200).

Almost surely, 2^131551155 is an apocalyptic number.

131551155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131551155 is a deficient number, since it is larger than the sum of its proper divisors (114631245).

131551155 is a wasteful number, since it uses less digits than its factorization.

131551155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51320 (or 51314 counting only the distinct ones).

The product of its digits is 1875, while the sum is 27.

The square root of 131551155 is about 11469.5751882971. The cubic root of 131551155 is about 508.5865708282.

The spelling of 131551155 in words is "one hundred thirty-one million, five hundred fifty-one thousand, one hundred fifty-five".