997251715 has 8 divisors (see below), whose sum is σ = 1198458288. Its totient is φ = 796630560.

The previous prime is 997251677. The next prime is 997251737. The reversal of 997251715 is 517152799.

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

It is not a de Polignac number, because 997251715 - 2¹¹ = 997249667 is a prime.

It is a super-3 number, since 3×997251715³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142596 + ... + 149425.

It is an arithmetic number, because the mean of its divisors is an integer number (149807286).

Almost surely, 2^997251715 is an apocalyptic number.

997251715 is a deficient number, since it is larger than the sum of its proper divisors (201206573).

997251715 is a wasteful number, since it uses less digits than its factorization.

997251715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292709.

The product of its digits is 198450, while the sum is 46.

The square root of 997251715 is about 31579.2925031578. The cubic root of 997251715 is about 999.0830644862.

The spelling of 997251715 in words is "nine hundred ninety-seven million, two hundred fifty-one thousand, seven hundred fifteen".