715077221 has 8 divisors (see below), whose sum is σ = 722020824. Its totient is φ = 708144640.

The previous prime is 715077173. The next prime is 715077257. The reversal of 715077221 is 122770517.

It can be written as a sum of positive squares in 4 ways, for example, as 84364225 + 630712996 = 9185^2 + 25114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-715077221 is a prime.

It is a super-2 number, since 2×715077221² = 1022670863986165682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (715077271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192635 + ... + 196311.

It is an arithmetic number, because the mean of its divisors is an integer number (90252603).

Almost surely, 2^715077221 is an apocalyptic number.

It is an amenable number.

715077221 is a deficient number, since it is larger than the sum of its proper divisors (6943603).

715077221 is a wasteful number, since it uses less digits than its factorization.

715077221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 715077221 is about 26740.9278260871. The cubic root of 715077221 is about 894.2335941827.

The spelling of 715077221 in words is "seven hundred fifteen million, seventy-seven thousand, two hundred twenty-one".