2221590 has 64 divisors (see below), whose sum is σ = 6220800. Its totient is φ = 497280.

The previous prime is 2221589. The next prime is 2221631. The reversal of 2221590 is 951222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14836 + ... + 14984.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2^2221590 is an apocalyptic number.

It is a pronic number, being equal to 1490×1491.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110400).

2221590 is an abundant number, since it is smaller than the sum of its proper divisors (3999210).

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

2221590 is a wasteful number, since it uses less digits than its factorization.

2221590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2221590 is about 1490.4999161355. The cubic root of 2221590 is about 130.4832115336.

It can be divided in two parts, 22 and 21590, that added together give a palindrome (21612).

The spelling of 2221590 in words is "two million, two hundred twenty-one thousand, five hundred ninety".