23261550 has 96 divisors (see below), whose sum is σ = 63329280. Its totient is φ = 5616000.

The previous prime is 23261549. The next prime is 23261573. The reversal of 23261550 is 5516232.

It is a self number, because there is not a number n which added to its sum of digits gives 23261550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153975 + ... + 154125.

It is an arithmetic number, because the mean of its divisors is an integer number (659680).

Almost surely, 2^23261550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23261550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31664640).

23261550 is an abundant number, since it is smaller than the sum of its proper divisors (40067730).

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

23261550 is a wasteful number, since it uses less digits than its factorization.

23261550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 23261550 is about 4823.0229109968. The cubic root of 23261550 is about 285.4606278447.

Adding to 23261550 its reverse (5516232), we get a palindrome (28777782).

The spelling of 23261550 in words is "twenty-three million, two hundred sixty-one thousand, five hundred fifty".