183720225 has 24 divisors (see below), whose sum is σ = 327117952. Its totient is φ = 90446400.

The previous prime is 183720211. The next prime is 183720233. The reversal of 183720225 is 522027381.

183720225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 183720225 - 2⁵ = 183720193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 183720192 and 183720201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93241 + ... + 95190.

Almost surely, 2^183720225 is an apocalyptic number.

183720225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

183720225 is a deficient number, since it is larger than the sum of its proper divisors (143397727).

183720225 is a wasteful number, since it uses less digits than its factorization.

183720225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188457 (or 188452 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 183720225 is about 13554.3433998110. The cubic root of 183720225 is about 568.4849733298.

The spelling of 183720225 in words is "one hundred eighty-three million, seven hundred twenty thousand, two hundred twenty-five".