7345715021 has 4 divisors (see below), whose sum is σ = 7524878844. Its totient is φ = 7166551200.

The previous prime is 7345715017. The next prime is 7345715033. The reversal of 7345715021 is 1205175437.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1016716996 + 6328998025 = 31886^2 + 79555^2 .

It is a cyclic number.

It is not a de Polignac number, because 7345715021 - 2² = 7345715017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7345715071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89581850 + ... + 89581931.

It is an arithmetic number, because the mean of its divisors is an integer number (1881219711).

Almost surely, 2^7345715021 is an apocalyptic number.

It is an amenable number.

7345715021 is a deficient number, since it is larger than the sum of its proper divisors (179163823).

7345715021 is a wasteful number, since it uses less digits than its factorization.

7345715021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179163822.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 7345715021 is about 85707.1468490230. The cubic root of 7345715021 is about 1943.9183762413.

The spelling of 7345715021 in words is "seven billion, three hundred forty-five million, seven hundred fifteen thousand, twenty-one".