131520155 has 16 divisors (see below), whose sum is σ = 170843904. Its totient is φ = 96620160.

The previous prime is 131520149. The next prime is 131520157. The reversal of 131520155 is 551025131.

It is a happy number.

It is not a de Polignac number, because 131520155 - 2¹⁰ = 131519131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131520155.

It is not an unprimeable number, because it can be changed into a prime (131520157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7670 + ... + 17940.

It is an arithmetic number, because the mean of its divisors is an integer number (10677744).

Almost surely, 2^131520155 is an apocalyptic number.

131520155 is a deficient number, since it is larger than the sum of its proper divisors (39323749).

131520155 is a wasteful number, since it uses less digits than its factorization.

131520155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10486.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 131520155 is about 11468.2237072705. The cubic root of 131520155 is about 508.5466182528.

Adding to 131520155 its reverse (551025131), we get a palindrome (682545286).

The spelling of 131520155 in words is "one hundred thirty-one million, five hundred twenty thousand, one hundred fifty-five".