2221373628 has 18 divisors (see below), whose sum is σ = 5615138984. Its totient is φ = 740457864.

The previous prime is 2221373611. The next prime is 2221373647. The reversal of 2221373628 is 8263731222.

2221373628 is a `hidden beast` number, since 2 + 2 + 21 + 3 + 7 + 3 + 628 = 666.

2221373628 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 (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 61704823 = 2221373628 / (2 + 2 + 2 + 1 + 3 + 7 + 3 + 6 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 2221373592 and 2221373601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30852376 + ... + 30852447.

Almost surely, 2^2221373628 is an apocalyptic number.

It is an amenable number.

2221373628 is an abundant number, since it is smaller than the sum of its proper divisors (3393765356).

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

2221373628 is a wasteful number, since it uses less digits than its factorization.

2221373628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61704833 (or 61704828 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 2221373628 is about 47131.4505187354. The cubic root of 2221373628 is about 1304.7897525385.

The spelling of 2221373628 in words is "two billion, two hundred twenty-one million, three hundred seventy-three thousand, six hundred twenty-eight".