2111512542 has 16 divisors (see below), whose sum is σ = 4232563200. Its totient is φ = 702247832.

The previous prime is 2111512511. The next prime is 2111512561. The reversal of 2111512542 is 2452151112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394542 + ... + 399857.

It is an arithmetic number, because the mean of its divisors is an integer number (264535200).

Almost surely, 2^2111512542 is an apocalyptic number.

2111512542 is an abundant number, since it is smaller than the sum of its proper divisors (2121050658).

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

2111512542 is a wasteful number, since it uses less digits than its factorization.

2111512542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794847.

The product of its digits is 800, while the sum is 24.

The square root of 2111512542 is about 45951.1973946273. The cubic root of 2111512542 is about 1282.9150161792.

Adding to 2111512542 its reverse (2452151112), we get a palindrome (4563663654).

The spelling of 2111512542 in words is "two billion, one hundred eleven million, five hundred twelve thousand, five hundred forty-two".