25220052 has 192 divisors, whose sum is σ = 81285120. Its totient is φ = 6652800.

The previous prime is 25220033. The next prime is 25220057. The reversal of 25220052 is 25002252.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25220057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 355177 + ... + 355247.

It is an arithmetic number, because the mean of its divisors is an integer number (423360).

Almost surely, 2^25220052 is an apocalyptic number.

25220052 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 25220052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

25220052 is an abundant number, since it is smaller than the sum of its proper divisors (56065068).

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

25220052 is a wasteful number, since it uses less digits than its factorization.

25220052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 25220052 is about 5021.9569890631. The cubic root of 25220052 is about 293.2571835159.

It can be divided in two parts, 252200 and 52, that added together give a palindrome (252252).

The spelling of 25220052 in words is "twenty-five million, two hundred twenty thousand, fifty-two".