131552399 has 8 divisors (see below), whose sum is σ = 144933840. Its totient is φ = 118408000.

The previous prime is 131552357. The next prime is 131552401. The reversal of 131552399 is 993255131.

It is a happy number.

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 131552399 - 2²⁴ = 114775183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131552339) 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, 58094 + ... + 60315.

It is an arithmetic number, because the mean of its divisors is an integer number (18116730).

Almost surely, 2^131552399 is an apocalyptic number.

131552399 is a deficient number, since it is larger than the sum of its proper divisors (13381441).

131552399 is a wasteful number, since it uses less digits than its factorization.

131552399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118521.

The product of its digits is 36450, while the sum is 38.

The square root of 131552399 is about 11469.6294185994. The cubic root of 131552399 is about 508.5881739554.

The spelling of 131552399 in words is "one hundred thirty-one million, five hundred fifty-two thousand, three hundred ninety-nine".