25213431 has 8 divisors (see below), whose sum is σ = 35595504. Its totient is φ = 15820160.

The previous prime is 25213427. The next prime is 25213453. The reversal of 25213431 is 13431252.

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 25213431 - 2² = 25213427 is a prime.

It is a super-2 number, since 2×25213431² = 1271434205583522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25213398 and 25213407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25213421) 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, 247140 + ... + 247241.

It is an arithmetic number, because the mean of its divisors is an integer number (4449438).

Almost surely, 2^25213431 is an apocalyptic number.

25213431 is a deficient number, since it is larger than the sum of its proper divisors (10382073).

25213431 is a wasteful number, since it uses less digits than its factorization.

25213431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494401.

The product of its digits is 720, while the sum is 21.

The square root of 25213431 is about 5021.2977406244. The cubic root of 25213431 is about 293.2315184122.

Adding to 25213431 its reverse (13431252), we get a palindrome (38644683).

The spelling of 25213431 in words is "twenty-five million, two hundred thirteen thousand, four hundred thirty-one".