2164552237 has 4 divisors (see below), whose sum is σ = 2217346236. Its totient is φ = 2111758240.

The previous prime is 2164552231. The next prime is 2164552267. The reversal of 2164552237 is 7322554612.

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 962612676 + 1201939561 = 31026^2 + 34669^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164552237 - 2²³ = 2156163629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2164552196 and 2164552205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164552231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26396938 + ... + 26397019.

It is an arithmetic number, because the mean of its divisors is an integer number (554336559).

Almost surely, 2^2164552237 is an apocalyptic number.

It is an amenable number.

2164552237 is a deficient number, since it is larger than the sum of its proper divisors (52793999).

2164552237 is an equidigital number, since it uses as much as digits as its factorization.

2164552237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52793998.

The product of its digits is 100800, while the sum is 37.

The square root of 2164552237 is about 46524.7486505838. The cubic root of 2164552237 is about 1293.5682784212.

The spelling of 2164552237 in words is "two billion, one hundred sixty-four million, five hundred fifty-two thousand, two hundred thirty-seven".