130721318 has 24 divisors (see below), whose sum is σ = 245643552. Its totient is φ = 51713424.

The previous prime is 130721293. The next prime is 130721323. The reversal of 130721318 is 813127031.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50030 + ... + 52577.

It is an arithmetic number, because the mean of its divisors is an integer number (10235148).

Almost surely, 2^130721318 is an apocalyptic number.

130721318 is a deficient number, since it is larger than the sum of its proper divisors (114922234).

130721318 is a wasteful number, since it uses less digits than its factorization.

130721318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102636 (or 102629 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 130721318 is about 11433.3423809488. The cubic root of 130721318 is about 507.5149103824.

Adding to 130721318 its reverse (813127031), we get a palindrome (943848349).

The spelling of 130721318 in words is "one hundred thirty million, seven hundred twenty-one thousand, three hundred eighteen".