131433551 has 4 divisors (see below), whose sum is σ = 131457672. Its totient is φ = 131409432.

The previous prime is 131433541. The next prime is 131433559. The reversal of 131433551 is 155334131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131433551 - 2²² = 127239247 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 131433551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131433559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416 + ... + 16218.

It is an arithmetic number, because the mean of its divisors is an integer number (32864418).

Almost surely, 2^131433551 is an apocalyptic number.

131433551 is a deficient number, since it is larger than the sum of its proper divisors (24121).

131433551 is an equidigital number, since it uses as much as digits as its factorization.

131433551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24120.

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

The square root of 131433551 is about 11464.4472609891. The cubic root of 131433551 is about 508.4349703666.

Adding to 131433551 its reverse (155334131), we get a palindrome (286767682).

The spelling of 131433551 in words is "one hundred thirty-one million, four hundred thirty-three thousand, five hundred fifty-one".