23220135 has 16 divisors (see below), whose sum is σ = 41280480. Its totient is φ = 12384000.

The previous prime is 23220091. The next prime is 23220139. The reversal of 23220135 is 53102232.

23220135 = 2153² + 2154² + ... + 2157².

It is not a de Polignac number, because 23220135 - 2¹⁴ = 23203751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85866 + ... + 86135.

It is an arithmetic number, because the mean of its divisors is an integer number (2580030).

Almost surely, 2^23220135 is an apocalyptic number.

23220135 is a deficient number, since it is larger than the sum of its proper divisors (18060345).

23220135 is a wasteful number, since it uses less digits than its factorization.

23220135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172015 (or 172009 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 23220135 is about 4818.7275291305. The cubic root of 23220135 is about 285.2911152794.

Adding to 23220135 its reverse (53102232), we get a palindrome (76322367).

The spelling of 23220135 in words is "twenty-three million, two hundred twenty thousand, one hundred thirty-five".