721014553 has 8 divisors (see below), whose sum is σ = 824183360. Its totient is φ = 617887440.

The previous prime is 721014529. The next prime is 721014589. The reversal of 721014553 is 355410127.

It is a happy number.

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 721014553 - 2²⁵ = 687460121 is a prime.

721014553 is a modest number, since divided by 14553 gives 721 as remainder.

It is not an unprimeable number, because it can be changed into a prime (721014253) 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, 50023 + ... + 62803.

It is an arithmetic number, because the mean of its divisors is an integer number (103022920).

Almost surely, 2^721014553 is an apocalyptic number.

It is an amenable number.

721014553 is a deficient number, since it is larger than the sum of its proper divisors (103168807).

721014553 is a wasteful number, since it uses less digits than its factorization.

721014553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20847.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 721014553 is about 26851.7141538487. The cubic root of 721014553 is about 896.7017353067.

The spelling of 721014553 in words is "seven hundred twenty-one million, fourteen thousand, five hundred fifty-three".