715183721 has 4 divisors (see below), whose sum is σ = 817352832. Its totient is φ = 613014612.

The previous prime is 715183709. The next prime is 715183739. The reversal of 715183721 is 127381517.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 127381517 = 89 ⋅1431253.

It is not a de Polignac number, because 715183721 - 2¹⁴ = 715167337 is a prime.

It is a super-2 number, since 2×715183721² = 1022975509566811682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715183751) 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, 51084545 + ... + 51084558.

It is an arithmetic number, because the mean of its divisors is an integer number (204338208).

Almost surely, 2^715183721 is an apocalyptic number.

It is an amenable number.

715183721 is a deficient number, since it is larger than the sum of its proper divisors (102169111).

715183721 is a wasteful number, since it uses less digits than its factorization.

715183721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102169110.

The product of its digits is 11760, while the sum is 35.

The square root of 715183721 is about 26742.9190815064. The cubic root of 715183721 is about 894.2779861949.

The spelling of 715183721 in words is "seven hundred fifteen million, one hundred eighty-three thousand, seven hundred twenty-one".