131604751 has 4 divisors (see below), whose sum is σ = 133835400. Its totient is φ = 129374104.

The previous prime is 131604749. The next prime is 131604761. The reversal of 131604751 is 157406131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 157406131 = 53 ⋅2969927.

It is a cyclic number.

It is not a de Polignac number, because 131604751 - 2¹ = 131604749 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 (131604731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115236 + ... + 1115353.

It is an arithmetic number, because the mean of its divisors is an integer number (33458850).

Almost surely, 2^131604751 is an apocalyptic number.

131604751 is a deficient number, since it is larger than the sum of its proper divisors (2230649).

131604751 is an equidigital number, since it uses as much as digits as its factorization.

131604751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230648.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 131604751 is about 11471.9113926146. The cubic root of 131604751 is about 508.6556301607.

It can be divided in two parts, 131604 and 751, that added together give a triangular number (132355 = T₅₁₄).

The spelling of 131604751 in words is "one hundred thirty-one million, six hundred four thousand, seven hundred fifty-one".