721715043 has 16 divisors (see below), whose sum is σ = 1100184320. Its totient is φ = 412248096.

The previous prime is 721715023. The next prime is 721715063. The reversal of 721715043 is 340517127.

It is an interprime number because it is at equal distance from previous prime (721715023) and next prime (721715063).

It is not a de Polignac number, because 721715043 - 2⁶ = 721714979 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 721715043.

It is not an unprimeable number, because it can be changed into a prime (721715023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67896 + ... + 77802.

It is an arithmetic number, because the mean of its divisors is an integer number (68761520).

Almost surely, 2^721715043 is an apocalyptic number.

721715043 is a deficient number, since it is larger than the sum of its proper divisors (378469277).

721715043 is a wasteful number, since it uses less digits than its factorization.

721715043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13386.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 721715043 is about 26864.7546610796. The cubic root of 721715043 is about 896.9920333268.

The spelling of 721715043 in words is "seven hundred twenty-one million, seven hundred fifteen thousand, forty-three".