25542330 has 128 divisors (see below), whose sum is σ = 73716480. Its totient is φ = 5591040.

The previous prime is 25542329. The next prime is 25542371. The reversal of 25542330 is 3324552.

It is a self number, because there is not a number n which added to its sum of digits gives 25542330.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 162612 + ... + 162768.

It is an arithmetic number, because the mean of its divisors is an integer number (575910).

Almost surely, 2^25542330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25542330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36858240).

25542330 is an abundant number, since it is smaller than the sum of its proper divisors (48174150).

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

25542330 is a wasteful number, since it uses less digits than its factorization.

25542330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 25542330 is about 5053.9420257854. The cubic root of 25542330 is about 294.5010429811.

Adding to 25542330 its reverse (3324552), we get a palindrome (28866882).

It can be divided in two parts, 2554 and 2330, that added together give a palindrome (4884).

The spelling of 25542330 in words is "twenty-five million, five hundred forty-two thousand, three hundred thirty".