23011225 has 12 divisors (see below), whose sum is σ = 29306284. Its totient is φ = 17910720.

The previous prime is 23011211. The next prime is 23011229. The reversal of 23011225 is 52211032.

It can be written as a sum of positive squares in 6 ways, for example, as 1814409 + 21196816 = 1347^2 + 4604^2 .

It is not a de Polignac number, because 23011225 - 2¹⁵ = 22978457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23011199 and 23011208.

It is not an unprimeable number, because it can be changed into a prime (23011229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11514 + ... + 13363.

Almost surely, 2^23011225 is an apocalyptic number.

23011225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23011225 is a deficient number, since it is larger than the sum of its proper divisors (6295059).

23011225 is a wasteful number, since it uses less digits than its factorization.

23011225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24924 (or 24919 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 23011225 is about 4797.0016677087. The cubic root of 23011225 is about 284.4329548186.

Subtracting from 23011225 its sum of digits (16), we obtain a square (23011209 = 4797²).

Adding to 23011225 its reverse (52211032), we get a palindrome (75222257).

The spelling of 23011225 in words is "twenty-three million, eleven thousand, two hundred twenty-five".