25155290 has 8 divisors (see below), whose sum is σ = 45279540. Its totient is φ = 10062112.

The previous prime is 25155287. The next prime is 25155311. The reversal of 25155290 is 9255152.

It can be written as a sum of positive squares in 2 ways, for example, as 20151121 + 5004169 = 4489^2 + 2237^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×25155290² = 1265577229968200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257755 + ... + 1257774.

Almost surely, 2^25155290 is an apocalyptic number.

25155290 is a deficient number, since it is larger than the sum of its proper divisors (20124250).

25155290 is a wasteful number, since it uses less digits than its factorization.

25155290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515536.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 25155290 is about 5015.5049596227. The cubic root of 25155290 is about 293.0059521907.

The spelling of 25155290 in words is "twenty-five million, one hundred fifty-five thousand, two hundred ninety".