25215432 has 96 divisors (see below), whose sum is σ = 73096800. Its totient is φ = 7223040.

The previous prime is 25215401. The next prime is 25215473. The reversal of 25215432 is 23451252.

25215432 = T₃₈₃ + T₃₈₄ + ... + T₅₉₁.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54948 + ... + 55404.

It is an arithmetic number, because the mean of its divisors is an integer number (761425).

Almost surely, 2^25215432 is an apocalyptic number.

25215432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25215432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36548400).

25215432 is an abundant number, since it is smaller than the sum of its proper divisors (47881368).

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

25215432 is a wasteful number, since it uses less digits than its factorization.

25215432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 492 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 25215432 is about 5021.4969879509. The cubic root of 25215432 is about 293.2392753989.

Adding to 25215432 its reverse (23451252), we get a palindrome (48666684).

The spelling of 25215432 in words is "twenty-five million, two hundred fifteen thousand, four hundred thirty-two".