131553555 has 32 divisors (see below), whose sum is σ = 246157824. Its totient is φ = 58738176.

The previous prime is 131553547. The next prime is 131553559. The reversal of 131553555 is 555355131.

It is not a de Polignac number, because 131553555 - 2³ = 131553547 is a prime.

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 (131553559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10054 + ... + 19083.

It is an arithmetic number, because the mean of its divisors is an integer number (7692432).

Almost surely, 2^131553555 is an apocalyptic number.

131553555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131553555 is a deficient number, since it is larger than the sum of its proper divisors (114604269).

131553555 is a wasteful number, since it uses less digits than its factorization.

131553555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29195.

The product of its digits is 28125, while the sum is 33.

The square root of 131553555 is about 11469.6798124446. The cubic root of 131553555 is about 508.5896636690.

The spelling of 131553555 in words is "one hundred thirty-one million, five hundred fifty-three thousand, five hundred fifty-five".