25403431 has 8 divisors (see below), whose sum is σ = 26753760. Its totient is φ = 24073632.

The previous prime is 25403407. The next prime is 25403461. The reversal of 25403431 is 13430452.

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

It is a cyclic number.

It is not a de Polignac number, because 25403431 - 2¹³ = 25395239 is a prime.

It is a super-2 number, since 2×25403431² = 1290668613143522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25403401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2560 + ... + 7573.

It is an arithmetic number, because the mean of its divisors is an integer number (3344220).

Almost surely, 2^25403431 is an apocalyptic number.

25403431 is a deficient number, since it is larger than the sum of its proper divisors (1350329).

25403431 is a wasteful number, since it uses less digits than its factorization.

25403431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10265.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 25403431 is about 5040.1816435521. The cubic root of 25403431 is about 293.9662408982.

Adding to 25403431 its reverse (13430452), we get a palindrome (38833883).

The spelling of 25403431 in words is "twenty-five million, four hundred three thousand, four hundred thirty-one".