715220520521 has 8 divisors (see below), whose sum is σ = 780788683080. Its totient is φ = 651159672192.

The previous prime is 715220520503. The next prime is 715220520527. The reversal of 715220520521 is 125025022517.

It can be written as a sum of positive squares in 4 ways, for example, as 86388966400 + 628831554121 = 293920^2 + 792989^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 715220520521 - 2¹⁸ = 715220258377 is a prime.

It is a super-2 number, since 2×715220520521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715220520527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376827566 + ... + 376829463.

It is an arithmetic number, because the mean of its divisors is an integer number (97598585385).

Almost surely, 2^715220520521 is an apocalyptic number.

It is an amenable number.

715220520521 is a deficient number, since it is larger than the sum of its proper divisors (65568162559).

715220520521 is a wasteful number, since it uses less digits than its factorization.

715220520521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753657115.

The product of its (nonzero) digits is 14000, while the sum is 32.

The spelling of 715220520521 in words is "seven hundred fifteen billion, two hundred twenty million, five hundred twenty thousand, five hundred twenty-one".