25431534 has 12 divisors (see below), whose sum is σ = 55101696. Its totient is φ = 8477172.

The previous prime is 25431517. The next prime is 25431569. The reversal of 25431534 is 43513452.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25431498 and 25431507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 706414 + ... + 706449.

It is an arithmetic number, because the mean of its divisors is an integer number (4591808).

Almost surely, 2^25431534 is an apocalyptic number.

25431534 is an abundant number, since it is smaller than the sum of its proper divisors (29670162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25431534 is a wasteful number, since it uses less digits than its factorization.

25431534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412871 (or 1412868 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 25431534 is about 5042.9687684934. The cubic root of 25431534 is about 294.0746027533.

Adding to 25431534 its reverse (43513452), we get a palindrome (68944986).

The spelling of 25431534 in words is "twenty-five million, four hundred thirty-one thousand, five hundred thirty-four".