2154111225 has 96 divisors (see below), whose sum is σ = 4536852480. Its totient is φ = 877962240.

The previous prime is 2154111151. The next prime is 2154111241. The reversal of 2154111225 is 5221114512.

It is a happy number.

It is not a de Polignac number, because 2154111225 - 2⁸ = 2154110969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2154111195 and 2154111204.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 163224 + ... + 175926.

It is an arithmetic number, because the mean of its divisors is an integer number (47258880).

Almost surely, 2^2154111225 is an apocalyptic number.

2154111225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2154111225 is an abundant number, since it is smaller than the sum of its proper divisors (2382741255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154111225 is a wasteful number, since it uses less digits than its factorization.

2154111225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12759 (or 12754 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 2154111225 is about 46412.4037839024. The cubic root of 2154111225 is about 1291.4850243824.

Adding to 2154111225 its reverse (5221114512), we get a palindrome (7375225737).

The spelling of 2154111225 in words is "two billion, one hundred fifty-four million, one hundred eleven thousand, two hundred twenty-five".