2113553444 has 48 divisors (see below), whose sum is σ = 3970270080. Its totient is φ = 982037760.

The previous prime is 2113553383. The next prime is 2113553447. The reversal of 2113553444 is 4443553112.

It is a super-2 number, since 2×2113553444² = 8934216321288522272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2113553444.

It is not an unprimeable number, because it can be changed into a prime (2113553447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1013627 + ... + 1015709.

It is an arithmetic number, because the mean of its divisors is an integer number (82713960).

Almost surely, 2^2113553444 is an apocalyptic number.

It is an amenable number.

2113553444 is a deficient number, since it is larger than the sum of its proper divisors (1856716636).

2113553444 is a wasteful number, since it uses less digits than its factorization.

2113553444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420 (or 2418 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 2113553444 is about 45973.3993087307. The cubic root of 2113553444 is about 1283.3282208750.

The spelling of 2113553444 in words is "two billion, one hundred thirteen million, five hundred fifty-three thousand, four hundred forty-four".