25433891 has 12 divisors (see below), whose sum is σ = 29699280. Its totient is φ = 21717360.

The previous prime is 25433879. The next prime is 25433923. The reversal of 25433891 is 19833452.

It is not a de Polignac number, because 25433891 - 2⁶ = 25433827 is a prime.

It is a super-2 number, since 2×25433891² = 1293765622799762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25433801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14405 + ... + 16073.

It is an arithmetic number, because the mean of its divisors is an integer number (2474940).

Almost surely, 2^25433891 is an apocalyptic number.

25433891 is a deficient number, since it is larger than the sum of its proper divisors (4265389).

25433891 is a wasteful number, since it uses less digits than its factorization.

25433891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 1987 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 25433891 is about 5043.2024547900. The cubic root of 25433891 is about 294.0836874383.

The spelling of 25433891 in words is "twenty-five million, four hundred thirty-three thousand, eight hundred ninety-one".