131255477 has 4 divisors (see below), whose sum is σ = 138163680. Its totient is φ = 124347276.

The previous prime is 131255429. The next prime is 131255491. The reversal of 131255477 is 774552131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131255477 - 2⁶ = 131255413 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 (131255497) 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, 3454073 + ... + 3454110.

It is an arithmetic number, because the mean of its divisors is an integer number (34540920).

Almost surely, 2^131255477 is an apocalyptic number.

It is an amenable number.

131255477 is a deficient number, since it is larger than the sum of its proper divisors (6908203).

131255477 is an equidigital number, since it uses as much as digits as its factorization.

131255477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6908202.

The product of its digits is 29400, while the sum is 35.

The square root of 131255477 is about 11456.6782707729. The cubic root of 131255477 is about 508.2052472651.

The spelling of 131255477 in words is "one hundred thirty-one million, two hundred fifty-five thousand, four hundred seventy-seven".