25615253 has 4 divisors (see below), whose sum is σ = 25727340. Its totient is φ = 25503168.

The previous prime is 25615223. The next prime is 25615259. The reversal of 25615253 is 35251652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13490929 + 12124324 = 3673^2 + 3482^2 .

It is a cyclic number.

It is not a de Polignac number, because 25615253 - 2⁸ = 25614997 is a prime.

It is a super-2 number, since 2×25615253² = 1312282372508018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25615259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55700 + ... + 56157.

It is an arithmetic number, because the mean of its divisors is an integer number (6431835).

Almost surely, 2^25615253 is an apocalyptic number.

It is an amenable number.

25615253 is a deficient number, since it is larger than the sum of its proper divisors (112087).

25615253 is a wasteful number, since it uses less digits than its factorization.

25615253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112086.

The product of its digits is 9000, while the sum is 29.

The square root of 25615253 is about 5061.1513512243. The cubic root of 25615253 is about 294.7810421578.

The spelling of 25615253 in words is "twenty-five million, six hundred fifteen thousand, two hundred fifty-three".