131550554 has 16 divisors (see below), whose sum is σ = 204853320. Its totient is φ = 63282240.

The previous prime is 131550553. The next prime is 131550557. The reversal of 131550554 is 455055131.

It can be written as a sum of positive squares in 4 ways, for example, as 122699929 + 8850625 = 11077^2 + 2975^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131550553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13124 + ... + 20864.

Almost surely, 2^131550554 is an apocalyptic number.

131550554 is a deficient number, since it is larger than the sum of its proper divisors (73302766).

131550554 is a wasteful number, since it uses less digits than its factorization.

131550554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8065.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 131550554 is about 11469.5489885174. The cubic root of 131550554 is about 508.5857963234.

The spelling of 131550554 in words is "one hundred thirty-one million, five hundred fifty thousand, five hundred fifty-four".