2251544220 has 36 divisors (see below), whose sum is σ = 6829684680. Its totient is φ = 600411744.

The previous prime is 2251544203. The next prime is 2251544231. The reversal of 2251544220 is 224451522.

2251544220 is a `hidden beast` number, since 225 + 15 + 4 + 422 + 0 = 666.

2251544220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6254110 + ... + 6254469.

Almost surely, 2^2251544220 is an apocalyptic number.

2251544220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2251544220 is an abundant number, since it is smaller than the sum of its proper divisors (4578140460).

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

2251544220 is a wasteful number, since it uses less digits than its factorization.

2251544220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12508594 (or 12508589 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 2251544220 is about 47450.4396186168. The cubic root of 2251544220 is about 1310.6704064217.

Adding to 2251544220 its reverse (224451522), we get a palindrome (2475995742).

The spelling of 2251544220 in words is "two billion, two hundred fifty-one million, five hundred forty-four thousand, two hundred twenty".