25352431 has 4 divisors (see below), whose sum is σ = 27302632. Its totient is φ = 23402232.

The previous prime is 25352429. The next prime is 25352449. The reversal of 25352431 is 13425352.

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 25352431 - 2¹ = 25352429 is a prime.

It is a super-2 number, since 2×25352431² = 1285491515219522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25352396 and 25352405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25352231) 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, 975081 + ... + 975106.

It is an arithmetic number, because the mean of its divisors is an integer number (6825658).

Almost surely, 2^25352431 is an apocalyptic number.

25352431 is a deficient number, since it is larger than the sum of its proper divisors (1950201).

25352431 is a wasteful number, since it uses less digits than its factorization.

25352431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950200.

The product of its digits is 3600, while the sum is 25.

The square root of 25352431 is about 5035.1197602440. The cubic root of 25352431 is about 293.7693866185.

Adding to 25352431 its reverse (13425352), we get a palindrome (38777783).

The spelling of 25352431 in words is "twenty-five million, three hundred fifty-two thousand, four hundred thirty-one".