2115011243 has 4 divisors (see below), whose sum is σ = 2116785288. Its totient is φ = 2113237200.

The previous prime is 2115011231. The next prime is 2115011273. The reversal of 2115011243 is 3421105112.

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

It is a cyclic number.

It is not a de Polignac number, because 2115011243 - 2⁶ = 2115011179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115011273) 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, 885233 + ... + 887618.

It is an arithmetic number, because the mean of its divisors is an integer number (529196322).

Almost surely, 2^2115011243 is an apocalyptic number.

2115011243 is a deficient number, since it is larger than the sum of its proper divisors (1774045).

2115011243 is a wasteful number, since it uses less digits than its factorization.

2115011243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774044.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2115011243 is about 45989.2513855140. The cubic root of 2115011243 is about 1283.6232066549.

Adding to 2115011243 its reverse (3421105112), we get a palindrome (5536116355).

The spelling of 2115011243 in words is "two billion, one hundred fifteen million, eleven thousand, two hundred forty-three".