2113544971 has 18 divisors (see below), whose sum is σ = 2279005260. Its totient is φ = 1954654416.

The previous prime is 2113544963. The next prime is 2113544981. The reversal of 2113544971 is 1794453112.

It is a happy number.

It is not a de Polignac number, because 2113544971 - 2³ = 2113544963 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2113544971.

It is not an unprimeable number, because it can be changed into a prime (2113544921) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10620730 + ... + 10620928.

Almost surely, 2^2113544971 is an apocalyptic number.

2113544971 is a deficient number, since it is larger than the sum of its proper divisors (165460289).

2113544971 is an frugal number, since it uses more digits than its factorization.

2113544971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523 (or 271 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 2113544971 is about 45973.3071575235. The cubic root of 2113544971 is about 1283.3265059662.

The spelling of 2113544971 in words is "two billion, one hundred thirteen million, five hundred forty-four thousand, nine hundred seventy-one".