23121150 has 96 divisors (see below), whose sum is σ = 62995968. Its totient is φ = 5577600.

The previous prime is 23121127. The next prime is 23121181. The reversal of 23121150 is 5112132.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 138367 + ... + 138533.

It is an arithmetic number, because the mean of its divisors is an integer number (656208).

Almost surely, 2^23121150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23121150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31497984).

23121150 is an abundant number, since it is smaller than the sum of its proper divisors (39874818).

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

23121150 is a wasteful number, since it uses less digits than its factorization.

23121150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 23121150 is about 4808.4456948166. The cubic root of 23121150 is about 284.8851491678.

Adding to 23121150 its reverse (5112132), we get a palindrome (28233282).

The spelling of 23121150 in words is "twenty-three million, one hundred twenty-one thousand, one hundred fifty".