2115544122 has 32 divisors (see below), whose sum is σ = 4719116160. Its totient is φ = 702495360.

The previous prime is 2115544121. The next prime is 2115544133. The reversal of 2115544122 is 2214455112.

It is a happy number.

2115544122 is a `hidden beast` number, since 2 + 115 + 544 + 1 + 2 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2115544121) 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, 60279 + ... + 88682.

It is an arithmetic number, because the mean of its divisors is an integer number (147472380).

Almost surely, 2^2115544122 is an apocalyptic number.

2115544122 is an abundant number, since it is smaller than the sum of its proper divisors (2603572038).

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

2115544122 is a wasteful number, since it uses less digits than its factorization.

2115544122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149235 (or 149229 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2115544122 is about 45995.0445374282. The cubic root of 2115544122 is about 1283.7310009460.

Adding to 2115544122 its reverse (2214455112), we get a palindrome (4329999234).

The spelling of 2115544122 in words is "two billion, one hundred fifteen million, five hundred forty-four thousand, one hundred twenty-two".