131204557 has 8 divisors (see below), whose sum is σ = 150665760. Its totient is φ = 112998960.

The previous prime is 131204537. The next prime is 131204587. The reversal of 131204557 is 755402131.

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 131204557 - 2²³ = 122815949 is a prime.

It is a super-3 number, since 3×131204557³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131204527) 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, 313678 + ... + 314095.

It is an arithmetic number, because the mean of its divisors is an integer number (18833220).

Almost surely, 2^131204557 is an apocalyptic number.

It is an amenable number.

131204557 is a deficient number, since it is larger than the sum of its proper divisors (19461203).

131204557 is a wasteful number, since it uses less digits than its factorization.

131204557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627803.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 131204557 is about 11454.4557705724. The cubic root of 131204557 is about 508.1395200820.

Adding to 131204557 its reverse (755402131), we get a palindrome (886606688).

The spelling of 131204557 in words is "one hundred thirty-one million, two hundred four thousand, five hundred fifty-seven".