2111552557 has 4 divisors (see below), whose sum is σ = 2123349120. Its totient is φ = 2099755996.

The previous prime is 2111552549. The next prime is 2111552563. The reversal of 2111552557 is 7552551112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2111552557 - 2³ = 2111552549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111552537) 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, 5898013 + ... + 5898370.

It is an arithmetic number, because the mean of its divisors is an integer number (530837280).

Almost surely, 2^2111552557 is an apocalyptic number.

It is an amenable number.

2111552557 is a deficient number, since it is larger than the sum of its proper divisors (11796563).

2111552557 is a wasteful number, since it uses less digits than its factorization.

2111552557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11796562.

The product of its digits is 17500, while the sum is 34.

The square root of 2111552557 is about 45951.6328001519. The cubic root of 2111552557 is about 1282.9231202466.

The spelling of 2111552557 in words is "two billion, one hundred eleven million, five hundred fifty-two thousand, five hundred fifty-seven".