2164155547 has 4 divisors (see below), whose sum is σ = 2183307480. Its totient is φ = 2145003616.

The previous prime is 2164155541. The next prime is 2164155551. The reversal of 2164155547 is 7455514612.

2164155547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2164155547 - 2³¹ = 16671899 is a prime.

It is a super-2 number, since 2×2164155547² = 9367138463221738418, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2164155541) 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, 9575797 + ... + 9576022.

It is an arithmetic number, because the mean of its divisors is an integer number (545826870).

Almost surely, 2^2164155547 is an apocalyptic number.

2164155547 is a deficient number, since it is larger than the sum of its proper divisors (19151933).

2164155547 is a wasteful number, since it uses less digits than its factorization.

2164155547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19151932.

The product of its digits is 168000, while the sum is 40.

The square root of 2164155547 is about 46520.4852403756. The cubic root of 2164155547 is about 1293.4892509990.

The spelling of 2164155547 in words is "two billion, one hundred sixty-four million, one hundred fifty-five thousand, five hundred forty-seven".