131645451 has 16 divisors (see below), whose sum is σ = 200777984. Its totient is φ = 75160224.

The previous prime is 131645443. The next prime is 131645473. The reversal of 131645451 is 154546131.

It is a happy number.

It is not a de Polignac number, because 131645451 - 2³ = 131645443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131645401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32241 + ... + 36093.

It is an arithmetic number, because the mean of its divisors is an integer number (12548624).

Almost surely, 2^131645451 is an apocalyptic number.

131645451 is a deficient number, since it is larger than the sum of its proper divisors (69132533).

131645451 is a wasteful number, since it uses less digits than its factorization.

131645451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5490.

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

The square root of 131645451 is about 11473.6851534283. The cubic root of 131645451 is about 508.7080602598.

The spelling of 131645451 in words is "one hundred thirty-one million, six hundred forty-five thousand, four hundred fifty-one".