2154422101 has 4 divisors (see below), whose sum is σ = 2320146892. Its totient is φ = 1988697312.

The previous prime is 2154422059. The next prime is 2154422107. The reversal of 2154422101 is 1012244512.

2154422101 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 can be written as a sum of positive squares in 2 ways, for example, as 607573201 + 1546848900 = 24649^2 + 39330^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154422101 - 2²⁵ = 2120867669 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 (2154422107) 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, 82862376 + ... + 82862401.

It is an arithmetic number, because the mean of its divisors is an integer number (580036723).

Almost surely, 2^2154422101 is an apocalyptic number.

It is an amenable number.

2154422101 is a deficient number, since it is larger than the sum of its proper divisors (165724791).

2154422101 is a wasteful number, since it uses less digits than its factorization.

2154422101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165724790.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2154422101 is about 46415.7527246947. The cubic root of 2154422101 is about 1291.5471493679.

Adding to 2154422101 its reverse (1012244512), we get a palindrome (3166666613).

The spelling of 2154422101 in words is "two billion, one hundred fifty-four million, four hundred twenty-two thousand, one hundred one".