25252251 has 8 divisors (see below), whose sum is σ = 33915984. Its totient is φ = 16711680.

The previous prime is 25252247. The next prime is 25252277. The reversal of 25252251 is 15225252.

Added to its reverse (15225252) it gives a triangular number (40477503 = T₈₉₉₇).

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

It is not a de Polignac number, because 25252251 - 2² = 25252247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25256251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30310 + ... + 31131.

It is an arithmetic number, because the mean of its divisors is an integer number (4239498).

Almost surely, 2^25252251 is an apocalyptic number.

25252251 is a deficient number, since it is larger than the sum of its proper divisors (8663733).

25252251 is a wasteful number, since it uses less digits than its factorization.

25252251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61581.

The product of its digits is 2000, while the sum is 24.

The square root of 25252251 is about 5025.1617884402. The cubic root of 25252251 is about 293.3819330919.

Adding to 25252251 its reverse (15225252), we get a triangular number (40477503 = T₈₉₉₇).

The spelling of 25252251 in words is "twenty-five million, two hundred fifty-two thousand, two hundred fifty-one".