515161255 has 24 divisors (see below), whose sum is σ = 742331520. Its totient is φ = 341853120.

The previous prime is 515161253. The next prime is 515161259. The reversal of 515161255 is 552161515.

It is not a de Polignac number, because 515161255 - 2¹ = 515161253 is a prime.

It is a super-2 number, since 2×515161255² = 530782237306350050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515161253) 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, 26320 + ... + 41509.

It is an arithmetic number, because the mean of its divisors is an integer number (30930480).

Almost surely, 2^515161255 is an apocalyptic number.

515161255 is a deficient number, since it is larger than the sum of its proper divisors (227170265).

515161255 is a wasteful number, since it uses less digits than its factorization.

515161255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67879 (or 67872 counting only the distinct ones).

The product of its digits is 7500, while the sum is 31.

The square root of 515161255 is about 22697.1640298959. The cubic root of 515161255 is about 801.6431099060.

The spelling of 515161255 in words is "five hundred fifteen million, one hundred sixty-one thousand, two hundred fifty-five".