721533265 has 8 divisors (see below), whose sum is σ = 911410560. Its totient is φ = 546846192.

The previous prime is 721533259. The next prime is 721533283. The reversal of 721533265 is 562335127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721533265 - 2⁵ = 721533233 is a prime.

It is a super-2 number, since 2×721533265² = 1041220505003120450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 721533265.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3797449 + ... + 3797638.

It is an arithmetic number, because the mean of its divisors is an integer number (113926320).

Almost surely, 2^721533265 is an apocalyptic number.

It is an amenable number.

721533265 is a deficient number, since it is larger than the sum of its proper divisors (189877295).

721533265 is a wasteful number, since it uses less digits than its factorization.

721533265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7595111.

The product of its digits is 37800, while the sum is 34.

The square root of 721533265 is about 26861.3712419899. The cubic root of 721533265 is about 896.9167186946.

The spelling of 721533265 in words is "seven hundred twenty-one million, five hundred thirty-three thousand, two hundred sixty-five".