2164012541 has 4 divisors (see below), whose sum is σ = 2170213500. Its totient is φ = 2157811584.

The previous prime is 2164012537. The next prime is 2164012573. The reversal of 2164012541 is 1452104612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1716859225 + 447153316 = 41435^2 + 21146^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164012541 - 2² = 2164012537 is a prime.

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 2164012541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164012141) 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, 3099956 + ... + 3100653.

It is an arithmetic number, because the mean of its divisors is an integer number (542553375).

Almost surely, 2^2164012541 is an apocalyptic number.

It is an amenable number.

2164012541 is a deficient number, since it is larger than the sum of its proper divisors (6200959).

2164012541 is an equidigital number, since it uses as much as digits as its factorization.

2164012541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200958.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2164012541 is about 46518.9481931825. The cubic root of 2164012541 is about 1293.4607593934.

The spelling of 2164012541 in words is "two billion, one hundred sixty-four million, twelve thousand, five hundred forty-one".