813513101 has 16 divisors (see below), whose sum is σ = 877484160. Its totient is φ = 751887360.

The previous prime is 813513097. The next prime is 813513149. The reversal of 813513101 is 101315318.

It is a cyclic number.

It is not a de Polignac number, because 813513101 - 2² = 813513097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813513901) 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, 127745 + ... + 133961.

It is an arithmetic number, because the mean of its divisors is an integer number (54842760).

Almost surely, 2^813513101 is an apocalyptic number.

It is an amenable number.

813513101 is a deficient number, since it is larger than the sum of its proper divisors (63971059).

813513101 is a wasteful number, since it uses less digits than its factorization.

813513101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 813513101 is about 28522.1510584318. The cubic root of 813513101 is about 933.5154651224.

Adding to 813513101 its reverse (101315318), we get a palindrome (914828419).

The spelling of 813513101 in words is "eight hundred thirteen million, five hundred thirteen thousand, one hundred one".