2111242549 has 4 divisors (see below), whose sum is σ = 2273645836. Its totient is φ = 1948839264.

The previous prime is 2111242547. The next prime is 2111242559. The reversal of 2111242549 is 9452421112.

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 592581649 + 1518660900 = 24343^2 + 38970^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111242549 - 2¹ = 2111242547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111242549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111242547) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 81201624 + ... + 81201649.

It is an arithmetic number, because the mean of its divisors is an integer number (568411459).

Almost surely, 2^2111242549 is an apocalyptic number.

It is an amenable number.

2111242549 is a deficient number, since it is larger than the sum of its proper divisors (162403287).

2111242549 is a wasteful number, since it uses less digits than its factorization.

2111242549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162403286.

The product of its digits is 5760, while the sum is 31.

The square root of 2111242549 is about 45948.2594773730. The cubic root of 2111242549 is about 1282.8603329712.

The spelling of 2111242549 in words is "two billion, one hundred eleven million, two hundred forty-two thousand, five hundred forty-nine".