2112997553 has 4 divisors (see below), whose sum is σ = 2115012900. Its totient is φ = 2110982208.

The previous prime is 2112997499. The next prime is 2112997561. The reversal of 2112997553 is 3557992112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1705442209 + 407555344 = 41297^2 + 20188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112997553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2112907553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006100 + ... + 1008197.

It is an arithmetic number, because the mean of its divisors is an integer number (528753225).

Almost surely, 2^2112997553 is an apocalyptic number.

It is an amenable number.

2112997553 is a deficient number, since it is larger than the sum of its proper divisors (2015347).

2112997553 is a wasteful number, since it uses less digits than its factorization.

2112997553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015346.

The product of its digits is 170100, while the sum is 44.

The square root of 2112997553 is about 45967.3531215362. The cubic root of 2112997553 is about 1283.2157005501.

The spelling of 2112997553 in words is "two billion, one hundred twelve million, nine hundred ninety-seven thousand, five hundred fifty-three".