721552116 has 24 divisors (see below), whose sum is σ = 1692350464. Its totient is φ = 239270400.

The previous prime is 721552093. The next prime is 721552127. The reversal of 721552116 is 611255127.

It is a super-2 number, since 2×721552116² = 1041274912208154912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153460 + ... + 158091.

Almost surely, 2^721552116 is an apocalyptic number.

It is an amenable number.

721552116 is an abundant number, since it is smaller than the sum of its proper divisors (970798348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721552116 is a wasteful number, since it uses less digits than its factorization.

721552116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311751 (or 311749 counting only the distinct ones).

The product of its digits is 4200, while the sum is 30.

The square root of 721552116 is about 26861.7221339213. The cubic root of 721552116 is about 896.9245296673.

The spelling of 721552116 in words is "seven hundred twenty-one million, five hundred fifty-two thousand, one hundred sixteen".