2251612420 has 24 divisors (see below), whose sum is σ = 4729929624. Its totient is φ = 900350976.

The previous prime is 2251612373. The next prime is 2251612453. The reversal of 2251612420 is 242161522.

It can be written as a sum of positive squares in 4 ways, for example, as 1122518016 + 1129094404 = 33504^2 + 33602^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 50772 + ... + 84148.

It is an arithmetic number, because the mean of its divisors is an integer number (197080401).

Almost surely, 2^2251612420 is an apocalyptic number.

2251612420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2251612420 is an abundant number, since it is smaller than the sum of its proper divisors (2478317204).

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

2251612420 is a wasteful number, since it uses less digits than its factorization.

2251612420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36759 (or 36757 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2251612420 is about 47451.1582577285. The cubic root of 2251612420 is about 1310.6836398311.

Adding to 2251612420 its reverse (242161522), we get a palindrome (2493773942).

The spelling of 2251612420 in words is "two billion, two hundred fifty-one million, six hundred twelve thousand, four hundred twenty".