2515925281 has 3 divisors (see below), whose sum is σ = 2515975441. Its totient is φ = 2515875122.

The previous prime is 2515925267. The next prime is 2515925287. The reversal of 2515925281 is 1825295152.

The square root of 2515925281 is 50159.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2515925281 - 2⁹ = 2515924769 is a prime.

It is a super-2 number, since 2×2515925281² = 12659760039149857922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2515925287) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25080 + ... + 75238.

Almost surely, 2^2515925281 is an apocalyptic number.

2515925281 is the 50159-th square number.

2515925281 is the 25080-th centered octagonal number.

It is an amenable number.

2515925281 is a deficient number, since it is larger than the sum of its proper divisors (50160).

2515925281 is an frugal number, since it uses more digits than its factorization.

2515925281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100318 (or 50159 counting only the distinct ones).

The product of its digits is 72000, while the sum is 40.

The cubic root of 2515925281 is about 1360.0845681625.

The spelling of 2515925281 in words is "two billion, five hundred fifteen million, nine hundred twenty-five thousand, two hundred eighty-one".