131564451 has 4 divisors (see below), whose sum is σ = 175419272. Its totient is φ = 87709632.

The previous prime is 131564443. The next prime is 131564471. The reversal of 131564451 is 154465131.

It is a happy number.

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

It is not a de Polignac number, because 131564451 - 2³ = 131564443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131564401) 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, 21927406 + ... + 21927411.

It is an arithmetic number, because the mean of its divisors is an integer number (43854818).

Almost surely, 2^131564451 is an apocalyptic number.

131564451 is a deficient number, since it is larger than the sum of its proper divisors (43854821).

131564451 is an equidigital number, since it uses as much as digits as its factorization.

131564451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43854820.

The product of its digits is 7200, while the sum is 30.

The square root of 131564451 is about 11470.1547940732. The cubic root of 131564451 is about 508.6037046933.

The spelling of 131564451 in words is "one hundred thirty-one million, five hundred sixty-four thousand, four hundred fifty-one".