25315432 has 8 divisors (see below), whose sum is σ = 47466450. Its totient is φ = 12657712.

The previous prime is 25315421. The next prime is 25315439. The reversal of 25315432 is 23451352.

It can be written as a sum of positive squares in only one way, i.e., 25260676 + 54756 = 5026^2 + 234^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 25315397 and 25315406.

It is not an unprimeable number, because it can be changed into a prime (25315439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1582207 + ... + 1582222.

Almost surely, 2^25315432 is an apocalyptic number.

It is an amenable number.

25315432 is a deficient number, since it is larger than the sum of its proper divisors (22151018).

25315432 is a wasteful number, since it uses less digits than its factorization.

25315432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164435 (or 3164431 counting only the distinct ones).

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

The square root of 25315432 is about 5031.4443254398. Note that the first 3 decimals coincide. The cubic root of 25315432 is about 293.6264093334.

Adding to 25315432 its reverse (23451352), we get a palindrome (48766784).

The spelling of 25315432 in words is "twenty-five million, three hundred fifteen thousand, four hundred thirty-two".