2221957000 has 64 divisors (see below), whose sum is σ = 5212771200. Its totient is φ = 886494400.

The previous prime is 2221956973. The next prime is 2221957027. The reversal of 2221957000 is 7591222.

It is an interprime number because it is at equal distance from previous prime (2221956973) and next prime (2221957027).

It is a self number, because there is not a number n which added to its sum of digits gives 2221957000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416349 + ... + 421651.

It is an arithmetic number, because the mean of its divisors is an integer number (81449550).

Almost surely, 2^2221957000 is an apocalyptic number.

2221957000 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 2221957000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2606385600).

2221957000 is an abundant number, since it is smaller than the sum of its proper divisors (2990814200).

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

2221957000 is a wasteful number, since it uses less digits than its factorization.

2221957000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743 (or 5729 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 2221957000 is about 47137.6388886843. The cubic root of 2221957000 is about 1304.9039628293.

The spelling of 2221957000 in words is "two billion, two hundred twenty-one million, nine hundred fifty-seven thousand".