25801431 has 4 divisors (see below), whose sum is σ = 34401912. Its totient is φ = 17200952.

The previous prime is 25801421. The next prime is 25801439. The reversal of 25801431 is 13410852.

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

It is a cyclic number.

It is not a de Polignac number, because 25801431 - 2¹³ = 25793239 is a prime.

It is a super-2 number, since 2×25801431² = 1331427683295522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25801439) 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, 4300236 + ... + 4300241.

It is an arithmetic number, because the mean of its divisors is an integer number (8600478).

Almost surely, 2^25801431 is an apocalyptic number.

25801431 is a deficient number, since it is larger than the sum of its proper divisors (8600481).

25801431 is an equidigital number, since it uses as much as digits as its factorization.

25801431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8600480.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 25801431 is about 5079.5109016519. The cubic root of 25801431 is about 295.4934993603.

The spelling of 25801431 in words is "twenty-five million, eight hundred one thousand, four hundred thirty-one".