2311011047 has 4 divisors (see below), whose sum is σ = 2348896536. Its totient is φ = 2273125560.

The previous prime is 2311011037. The next prime is 2311011091. The reversal of 2311011047 is 7401101132.

It is a happy number.

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 2311011047 - 2³⁰ = 1237269223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311011007) 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, 18942653 + ... + 18942774.

It is an arithmetic number, because the mean of its divisors is an integer number (587224134).

Almost surely, 2^2311011047 is an apocalyptic number.

2311011047 is a deficient number, since it is larger than the sum of its proper divisors (37885489).

2311011047 is an equidigital number, since it uses as much as digits as its factorization.

2311011047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37885488.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 2311011047 is about 48072.9762652574. The cubic root of 2311011047 is about 1322.1092401279.

Adding to 2311011047 its reverse (7401101132), we get a palindrome (9712112179).

The spelling of 2311011047 in words is "two billion, three hundred eleven million, eleven thousand, forty-seven".