515226997 has 8 divisors (see below), whose sum is σ = 520349976. Its totient is φ = 510124032.

The previous prime is 515226953. The next prime is 515227001. The reversal of 515226997 is 799622515.

It can be written as a sum of positive squares in 4 ways, for example, as 282542481 + 232684516 = 16809^2 + 15254^2 .

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 515226997 - 2¹¹ = 515224949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515226937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49653 + ... + 59125.

It is an arithmetic number, because the mean of its divisors is an integer number (65043747).

Almost surely, 2^515226997 is an apocalyptic number.

It is an amenable number.

515226997 is a deficient number, since it is larger than the sum of its proper divisors (5122979).

515226997 is a wasteful number, since it uses less digits than its factorization.

515226997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10007.

The product of its digits is 340200, while the sum is 46.

The square root of 515226997 is about 22698.6122263014. The cubic root of 515226997 is about 801.6772088599.

The spelling of 515226997 in words is "five hundred fifteen million, two hundred twenty-six thousand, nine hundred ninety-seven".