131623651 has 4 divisors (see below), whose sum is σ = 131659632. Its totient is φ = 131587672.

The previous prime is 131623649. The next prime is 131623669. The reversal of 131623651 is 156326131.

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 131623651 - 2¹ = 131623649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131623601) 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, 11791 + ... + 20056.

It is an arithmetic number, because the mean of its divisors is an integer number (32914908).

Almost surely, 2^131623651 is an apocalyptic number.

131623651 is a deficient number, since it is larger than the sum of its proper divisors (35981).

131623651 is an equidigital number, since it uses as much as digits as its factorization.

131623651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35980.

The product of its digits is 3240, while the sum is 28.

The square root of 131623651 is about 11472.7351141740. The cubic root of 131623651 is about 508.6799786516.

Adding to 131623651 its reverse (156326131), we get a palindrome (287949782).

The spelling of 131623651 in words is "one hundred thirty-one million, six hundred twenty-three thousand, six hundred fifty-one".