715016521 has 2 divisors, whose sum is σ = 715016522. Its totient is φ = 715016520.

The previous prime is 715016509. The next prime is 715016537. The reversal of 715016521 is 125610517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541725625 + 173290896 = 23275^2 + 13164^2 .

It is an emirp because it is prime and its reverse (125610517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 715016521 - 2²³ = 706627913 is a prime.

It is a super-2 number, since 2×715016521² = 1022497250605886882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 715016521.

It is not a weakly prime, because it can be changed into another prime (715016591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357508260 + 357508261.

It is an arithmetic number, because the mean of its divisors is an integer number (357508261).

Almost surely, 2^715016521 is an apocalyptic number.

It is an amenable number.

715016521 is a deficient number, since it is larger than the sum of its proper divisors (1).

715016521 is an equidigital number, since it uses as much as digits as its factorization.

715016521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 715016521 is about 26739.7928376418. The cubic root of 715016521 is about 894.2082908478.

The spelling of 715016521 in words is "seven hundred fifteen million, sixteen thousand, five hundred twenty-one".