2215542444 has 24 divisors (see below), whose sum is σ = 5177438448. Its totient is φ = 737394240.

The previous prime is 2215542437. The next prime is 2215542451. The reversal of 2215542444 is 4442455122.

It is an interprime number because it is at equal distance from previous prime (2215542437) and next prime (2215542451).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131727 + ... + 147590.

It is an arithmetic number, because the mean of its divisors is an integer number (215726602).

Almost surely, 2^2215542444 is an apocalyptic number.

It is an amenable number.

2215542444 is an abundant number, since it is smaller than the sum of its proper divisors (2961896004).

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

2215542444 is a wasteful number, since it uses less digits than its factorization.

2215542444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279985 (or 279983 counting only the distinct ones).

The product of its digits is 51200, while the sum is 33.

The square root of 2215542444 is about 47069.5490099491. The cubic root of 2215542444 is about 1303.6470457229.

Adding to 2215542444 its reverse (4442455122), we get a palindrome (6657997566).

The spelling of 2215542444 in words is "two billion, two hundred fifteen million, five hundred forty-two thousand, four hundred forty-four".