515997696 has 128 divisors (see below), whose sum is σ = 1431284400. Its totient is φ = 165150720.

The previous prime is 515997689. The next prime is 515997707. The reversal of 515997696 is 696799515.

It is a tau number, because it is divible by the number of its divisors (128).

Its product of digits (4592700) is a multiple of the sum of its prime factors (243).

It is a congruent 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, 2850726 + ... + 2850906.

Almost surely, 2^515997696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515997696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715642200).

515997696 is an abundant number, since it is smaller than the sum of its proper divisors (915286704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515997696 is an equidigital number, since it uses as much as digits as its factorization.

515997696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 215 counting only the distinct ones).

The product of its digits is 4592700, while the sum is 57.

The square root of 515997696 is about 22715.5826691723. The cubic root of 515997696 is about 802.0767376195.

It can be divided in two parts, 51599 and 7696, that added together give a palindrome (59295).

The spelling of 515997696 in words is "five hundred fifteen million, nine hundred ninety-seven thousand, six hundred ninety-six".