2525243220 has 72 divisors (see below), whose sum is σ = 7702323720. Its totient is φ = 669669120.

The previous prime is 2525243159. The next prime is 2525243233. The reversal of 2525243220 is 223425252.

It can be written as a sum of positive squares in 4 ways, for example, as 250525584 + 2274717636 = 15828^2 + 47694^2 .

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6175 + ... + 71334.

Almost surely, 2^2525243220 is an apocalyptic number.

2525243220 is a gapful number since it is divisible by the number (20) 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 2525243220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3851161860).

2525243220 is an abundant number, since it is smaller than the sum of its proper divisors (5177080500).

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

2525243220 is a wasteful number, since it uses less digits than its factorization.

2525243220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77705 (or 77700 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 2525243220 is about 50251.7981767817. The cubic root of 2525243220 is about 1361.7615617586.

Adding to 2525243220 its reverse (223425252), we get a palindrome (2748668472).

The spelling of 2525243220 in words is "two billion, five hundred twenty-five million, two hundred forty-three thousand, two hundred twenty".