131125555 has 32 divisors (see below), whose sum is σ = 181958400. Its totient is φ = 89712000.

The previous prime is 131125541. The next prime is 131125571. The reversal of 131125555 is 555521131.

It is not a de Polignac number, because 131125555 - 2¹¹ = 131123507 is a prime.

It is a super-2 number, since 2×131125555² = 34387822348116050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186705 + ... + 187405.

It is an arithmetic number, because the mean of its divisors is an integer number (5686200).

Almost surely, 2^131125555 is an apocalyptic number.

131125555 is a deficient number, since it is larger than the sum of its proper divisors (50832845).

131125555 is a wasteful number, since it uses less digits than its factorization.

131125555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915.

The product of its digits is 3750, while the sum is 28.

The square root of 131125555 is about 11451.0067243016. The cubic root of 131125555 is about 508.0375111801.

Adding to 131125555 its reverse (555521131), we get a palindrome (686646686).

The spelling of 131125555 in words is "one hundred thirty-one million, one hundred twenty-five thousand, five hundred fifty-five".