721362533 has 16 divisors (see below), whose sum is σ = 748673280. Its totient is φ = 694636800.

The previous prime is 721362527. The next prime is 721362541. The reversal of 721362533 is 335263127.

It is a cyclic number.

It is not a de Polignac number, because 721362533 - 2⁶ = 721362469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 721362533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721362553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1384313 + ... + 1384833.

It is an arithmetic number, because the mean of its divisors is an integer number (46792080).

Almost surely, 2^721362533 is an apocalyptic number.

It is an amenable number.

721362533 is a deficient number, since it is larger than the sum of its proper divisors (27310747).

721362533 is a wasteful number, since it uses less digits than its factorization.

721362533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988.

The product of its digits is 22680, while the sum is 32.

The square root of 721362533 is about 26858.1930330393. The cubic root of 721362533 is about 896.8459691429.

The spelling of 721362533 in words is "seven hundred twenty-one million, three hundred sixty-two thousand, five hundred thirty-three".