2154020225 has 12 divisors (see below), whose sum is σ = 3052554624. Its totient is φ = 1477042320.

The previous prime is 2154020189. The next prime is 2154020249. The reversal of 2154020225 is 5220204512.

It is not a de Polignac number, because 2154020225 - 2⁶ = 2154020161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154020225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6154169 + ... + 6154518.

It is an arithmetic number, because the mean of its divisors is an integer number (254379552).

Almost surely, 2^2154020225 is an apocalyptic number.

2154020225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2154020225 is a deficient number, since it is larger than the sum of its proper divisors (898534399).

2154020225 is a wasteful number, since it uses less digits than its factorization.

2154020225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12308704 (or 12308699 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 2154020225 is about 46411.4234321681. The cubic root of 2154020225 is about 1291.4668379503.

Adding to 2154020225 its reverse (5220204512), we get a palindrome (7374224737).

The spelling of 2154020225 in words is "two billion, one hundred fifty-four million, twenty thousand, two hundred twenty-five".