2521222740 has 192 divisors, whose sum is σ = 8667025920. Its totient is φ = 605214720.

The previous prime is 2521222673. The next prime is 2521222771. The reversal of 2521222740 is 472221252.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 205170 + ... + 217110.

It is an arithmetic number, because the mean of its divisors is an integer number (45140760).

Almost surely, 2^2521222740 is an apocalyptic number.

2521222740 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 2521222740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4333512960).

2521222740 is an abundant number, since it is smaller than the sum of its proper divisors (6145803180).

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

2521222740 is a wasteful number, since it uses less digits than its factorization.

2521222740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11999 (or 11991 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 2521222740 is about 50211.7788969879. The cubic root of 2521222740 is about 1361.0384837821.

Adding to 2521222740 its reverse (472221252), we get a palindrome (2993443992).

The spelling of 2521222740 in words is "two billion, five hundred twenty-one million, two hundred twenty-two thousand, seven hundred forty".