721813514 has 16 divisors (see below), whose sum is σ = 1091664000. Its totient is φ = 357933264.

The previous prime is 721813511. The next prime is 721813529. The reversal of 721813514 is 415318127.

It is not an unprimeable number, because it can be changed into a prime (721813511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248579 + ... + 251465.

It is an arithmetic number, because the mean of its divisors is an integer number (68229000).

Almost surely, 2^721813514 is an apocalyptic number.

721813514 is a deficient number, since it is larger than the sum of its proper divisors (369850486).

721813514 is a wasteful number, since it uses less digits than its factorization.

721813514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877.

The product of its digits is 6720, while the sum is 32.

The square root of 721813514 is about 26866.5873158464. The cubic root of 721813514 is about 897.0328267519.

The spelling of 721813514 in words is "seven hundred twenty-one million, eight hundred thirteen thousand, five hundred fourteen".