515420253 has 24 divisors (see below), whose sum is σ = 781872000. Its totient is φ = 339251328.

The previous prime is 515420209. The next prime is 515420261. The reversal of 515420253 is 352024515.

It is a happy number.

It is not a de Polignac number, because 515420253 - 2⁸ = 515419997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515420273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5773 + ... + 32621.

It is an arithmetic number, because the mean of its divisors is an integer number (32578000).

Almost surely, 2^515420253 is an apocalyptic number.

It is an amenable number.

515420253 is a deficient number, since it is larger than the sum of its proper divisors (266451747).

515420253 is an equidigital number, since it uses as much as digits as its factorization.

515420253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26943 (or 26931 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 515420253 is about 22702.8688275293. The cubic root of 515420253 is about 801.7774297754. Note that the first 3 decimals are identical.

Adding to 515420253 its reverse (352024515), we get a palindrome (867444768).

The spelling of 515420253 in words is "five hundred fifteen million, four hundred twenty thousand, two hundred fifty-three".