2122154245 has 8 divisors (see below), whose sum is σ = 2569948920. Its totient is φ = 1682147520.

The previous prime is 2122154231. The next prime is 2122154267. The reversal of 2122154245 is 5424512212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 985520449 + 1136633796 = 31393^2 + 33714^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2122154245 - 2²⁹ = 1585283333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946386 + ... + 1947475.

It is an arithmetic number, because the mean of its divisors is an integer number (321243615).

Almost surely, 2^2122154245 is an apocalyptic number.

It is an amenable number.

2122154245 is a deficient number, since it is larger than the sum of its proper divisors (447794675).

2122154245 is a wasteful number, since it uses less digits than its factorization.

2122154245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893975.

The product of its digits is 6400, while the sum is 28.

The square root of 2122154245 is about 46066.8453988332. The cubic root of 2122154245 is about 1285.0666379771.

Adding to 2122154245 its reverse (5424512212), we get a palindrome (7546666457).

It can be divided in two parts, 21221 and 54245, that added together give a triangular number (75466 = T₃₈₈).

The spelling of 2122154245 in words is "two billion, one hundred twenty-two million, one hundred fifty-four thousand, two hundred forty-five".