23006550 has 48 divisors (see below), whose sum is σ = 65210112. Its totient is φ = 5258400.

The previous prime is 23006537. The next prime is 23006551. The reversal of 23006550 is 5560032.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23006551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9906 + ... + 12005.

It is an arithmetic number, because the mean of its divisors is an integer number (1358544).

Almost surely, 2^23006550 is an apocalyptic number.

23006550 is an abundant number, since it is smaller than the sum of its proper divisors (42203562).

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

23006550 is a wasteful number, since it uses less digits than its factorization.

23006550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21933 (or 21928 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 23006550 is about 4796.5143594073. The cubic root of 23006550 is about 284.4136915515.

Adding to 23006550 its reverse (5560032), we get a palindrome (28566582).

The spelling of 23006550 in words is "twenty-three million, six thousand, five hundred fifty".