25211172 has 48 divisors (see below), whose sum is σ = 68382720. Its totient is φ = 7079712.

The previous prime is 25211161. The next prime is 25211183. The reversal of 25211172 is 27111252.

It is an interprime number because it is at equal distance from previous prime (25211161) and next prime (25211183).

It is a super-2 number, since 2×25211172² = 1271206387227168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2413 + ... + 7499.

It is an arithmetic number, because the mean of its divisors is an integer number (1424640).

Almost surely, 2^25211172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25211172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34191360).

25211172 is an abundant number, since it is smaller than the sum of its proper divisors (43171548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25211172 is a wasteful number, since it uses less digits than its factorization.

25211172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160 (or 5158 counting only the distinct ones).

The product of its digits is 280, while the sum is 21.

The square root of 25211172 is about 5021.0727937364. The cubic root of 25211172 is about 293.2227607811. Note that the first 3 decimals are identical.

The spelling of 25211172 in words is "twenty-five million, two hundred eleven thousand, one hundred seventy-two".