23101220 has 12 divisors (see below), whose sum is σ = 48512604. Its totient is φ = 9240480.

The previous prime is 23101219. The next prime is 23101279. The reversal of 23101220 is 2210132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4919524 + 18181696 = 2218^2 + 4264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577511 + ... + 577550.

It is an arithmetic number, because the mean of its divisors is an integer number (4042717).

Almost surely, 2^23101220 is an apocalyptic number.

23101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23101220 is an abundant number, since it is smaller than the sum of its proper divisors (25411384).

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

23101220 is a wasteful number, since it uses less digits than its factorization.

23101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155070 (or 1155068 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 23101220 is about 4806.3728527862. The cubic root of 23101220 is about 284.8032704091.

Adding to 23101220 its reverse (2210132), we get a palindrome (25311352).

The spelling of 23101220 in words is "twenty-three million, one hundred one thousand, two hundred twenty".