2164249157 has 4 divisors (see below), whose sum is σ = 2473427616. Its totient is φ = 1855070700.

The previous prime is 2164249133. The next prime is 2164249201. The reversal of 2164249157 is 7519424612.

2164249157 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2164249157 - 2¹⁰ = 2164248133 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 (2164249057) 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, 154589219 + ... + 154589232.

It is an arithmetic number, because the mean of its divisors is an integer number (618356904).

Almost surely, 2^2164249157 is an apocalyptic number.

It is an amenable number.

2164249157 is a deficient number, since it is larger than the sum of its proper divisors (309178459).

2164249157 is an equidigital number, since it uses as much as digits as its factorization.

2164249157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309178458.

The product of its digits is 120960, while the sum is 41.

The square root of 2164249157 is about 46521.4913453986. The cubic root of 2164249157 is about 1293.5079005800.

The spelling of 2164249157 in words is "two billion, one hundred sixty-four million, two hundred forty-nine thousand, one hundred fifty-seven".