2115651011 has 4 divisors (see below), whose sum is σ = 2115747024. Its totient is φ = 2115555000.

The previous prime is 2115650981. The next prime is 2115651053. The reversal of 2115651011 is 1101565112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2115651011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115611011) 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, 3386 + ... + 65136.

It is an arithmetic number, because the mean of its divisors is an integer number (528936756).

Almost surely, 2^2115651011 is an apocalyptic number.

2115651011 is a deficient number, since it is larger than the sum of its proper divisors (96013).

2115651011 is an equidigital number, since it uses as much as digits as its factorization.

2115651011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96012.

The product of its (nonzero) digits is 300, while the sum is 23.

The square root of 2115651011 is about 45996.2064848831. The cubic root of 2115651011 is about 1283.7526209807.

The spelling of 2115651011 in words is "two billion, one hundred fifteen million, six hundred fifty-one thousand, eleven".