2221662004 has 24 divisors (see below), whose sum is σ = 3933071240. Its totient is φ = 1097957376.

The previous prime is 2221661989. The next prime is 2221662019. The reversal of 2221662004 is 4002661222.

It is an interprime number because it is at equal distance from previous prime (2221661989) and next prime (2221662019).

It can be written as a sum of positive squares in 4 ways, for example, as 209960100 + 2011701904 = 14490^2 + 44852^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2221662004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337012 + ... + 343540.

Almost surely, 2^2221662004 is an apocalyptic number.

It is an amenable number.

2221662004 is a deficient number, since it is larger than the sum of its proper divisors (1711409236).

2221662004 is a wasteful number, since it uses less digits than its factorization.

2221662004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7507 (or 7505 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 2221662004 is about 47134.5096930052. The cubic root of 2221662004 is about 1304.8462121639.

It can be divided in two parts, 2221 and 662004, that added together give a square (664225 = 815²).

The spelling of 2221662004 in words is "two billion, two hundred twenty-one million, six hundred sixty-two thousand, four".