23125220 has 12 divisors (see below), whose sum is σ = 48563004. Its totient is φ = 9250080.

The previous prime is 23125199. The next prime is 23125229. The reversal of 23125220 is 2252132.

It can be written as a sum of positive squares in 2 ways, for example, as 10903204 + 12222016 = 3302^2 + 3496^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23125229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578111 + ... + 578150.

It is an arithmetic number, because the mean of its divisors is an integer number (4046917).

Almost surely, 2^23125220 is an apocalyptic number.

23125220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23125220 is an abundant number, since it is smaller than the sum of its proper divisors (25437784).

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

23125220 is a wasteful number, since it uses less digits than its factorization.

23125220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156270 (or 1156268 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 23125220 is about 4808.8688898742. The cubic root of 23125220 is about 284.9018642321.

Adding to 23125220 its reverse (2252132), we get a palindrome (25377352).

The spelling of 23125220 in words is "twenty-three million, one hundred twenty-five thousand, two hundred twenty".