23121580 has 12 divisors (see below), whose sum is σ = 48555360. Its totient is φ = 9248624.

The previous prime is 23121557. The next prime is 23121583. The reversal of 23121580 is 8512132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578020 + ... + 578059.

It is an arithmetic number, because the mean of its divisors is an integer number (4046280).

Almost surely, 2^23121580 is an apocalyptic number.

23121580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121580 is an abundant number, since it is smaller than the sum of its proper divisors (25433780).

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

23121580 is a wasteful number, since it uses less digits than its factorization.

23121580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156088 (or 1156086 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 23121580 is about 4808.4904076020. The cubic root of 23121580 is about 284.8869152255.

The spelling of 23121580 in words is "twenty-three million, one hundred twenty-one thousand, five hundred eighty".