131620513 has 16 divisors (see below), whose sum is σ = 142442496. Its totient is φ = 121263120.

The previous prime is 131620469. The next prime is 131620523. The reversal of 131620513 is 315026131.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131620513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131620523) 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, 261420 + ... + 261922.

It is an arithmetic number, because the mean of its divisors is an integer number (8902656).

Almost surely, 2^131620513 is an apocalyptic number.

It is an amenable number.

131620513 is a deficient number, since it is larger than the sum of its proper divisors (10821983).

131620513 is a wasteful number, since it uses less digits than its factorization.

131620513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 131620513 is about 11472.5983543398. The cubic root of 131620513 is about 508.6759361905.

Adding to 131620513 its reverse (315026131), we get a palindrome (446646644).

The spelling of 131620513 in words is "one hundred thirty-one million, six hundred twenty thousand, five hundred thirteen".