131551433 has 8 divisors (see below), whose sum is σ = 142158408. Its totient is φ = 121014144.

The previous prime is 131551429. The next prime is 131551439. The reversal of 131551433 is 334155131.

It can be written as a sum of positive squares in 4 ways, for example, as 10837264 + 120714169 = 3292^2 + 10987^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131551433 - 2² = 131551429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131551439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13460 + ... + 21077.

It is an arithmetic number, because the mean of its divisors is an integer number (17769801).

Almost surely, 2^131551433 is an apocalyptic number.

131551433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131551433 is a deficient number, since it is larger than the sum of its proper divisors (10606975).

131551433 is a wasteful number, since it uses less digits than its factorization.

131551433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34843.

The product of its digits is 2700, while the sum is 26.

The square root of 131551433 is about 11469.5873073097. The cubic root of 131551433 is about 508.5869290842.

The spelling of 131551433 in words is "one hundred thirty-one million, five hundred fifty-one thousand, four hundred thirty-three".