721313352 has 48 divisors (see below), whose sum is σ = 1970867340. Its totient is φ = 238307328.

The previous prime is 721313339. The next prime is 721313377. The reversal of 721313352 is 253313127.

It can be written as a sum of positive squares in 2 ways, for example, as 662238756 + 59074596 = 25734^2 + 7686^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36193 + ... + 52464.

Almost surely, 2^721313352 is an apocalyptic number.

721313352 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

721313352 is an abundant number, since it is smaller than the sum of its proper divisors (1249553988).

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

721313352 is a wasteful number, since it uses less digits than its factorization.

721313352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88782 (or 88775 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 721313352 is about 26857.2774495108. The cubic root of 721313352 is about 896.8255869809.

Adding to 721313352 its reverse (253313127), we get a palindrome (974626479).

The spelling of 721313352 in words is "seven hundred twenty-one million, three hundred thirteen thousand, three hundred fifty-two".