2522220400 has 120 divisors (see below), whose sum is σ = 6945800480. Its totient is φ = 862202880.

The previous prime is 2522220391. The next prime is 2522220409. The reversal of 2522220400 is 40222252.

It is an interprime number because it is at equal distance from previous prime (2522220391) and next prime (2522220409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2522220409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1110466 + ... + 1112734.

Almost surely, 2^2522220400 is an apocalyptic number.

2522220400 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 2522220400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3472900240).

2522220400 is an abundant number, since it is smaller than the sum of its proper divisors (4423580080).

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

2522220400 is a wasteful number, since it uses less digits than its factorization.

2522220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691 (or 2680 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 2522220400 is about 50221.7124359574. The cubic root of 2522220400 is about 1361.2179832723.

Adding to 2522220400 its reverse (40222252), we get a palindrome (2562442652).

The spelling of 2522220400 in words is "two billion, five hundred twenty-two million, two hundred twenty thousand, four hundred".