131311651 has 4 divisors (see below), whose sum is σ = 131350032. Its totient is φ = 131273272.

The previous prime is 131311627. The next prime is 131311657. The reversal of 131311651 is 156113131.

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

It is a cyclic number.

It is not a de Polignac number, because 131311651 - 2⁹ = 131311139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131311657) 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, 13495 + ... + 21088.

It is an arithmetic number, because the mean of its divisors is an integer number (32837508).

Almost surely, 2^131311651 is an apocalyptic number.

131311651 is a deficient number, since it is larger than the sum of its proper divisors (38381).

131311651 is an equidigital number, since it uses as much as digits as its factorization.

131311651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38380.

The product of its digits is 270, while the sum is 22.

The square root of 131311651 is about 11459.1295917273. The cubic root of 131311651 is about 508.2777365574.

Adding to 131311651 its reverse (156113131), we get a palindrome (287424782).

The spelling of 131311651 in words is "one hundred thirty-one million, three hundred eleven thousand, six hundred fifty-one".