23121577 has 8 divisors (see below), whose sum is σ = 23500800. Its totient is φ = 22745184.

The previous prime is 23121557. The next prime is 23121583. The reversal of 23121577 is 77512132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23121577 - 2¹¹ = 23119529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20728 + ... + 21814.

It is an arithmetic number, because the mean of its divisors is an integer number (2937600).

Almost surely, 2^23121577 is an apocalyptic number.

It is an amenable number.

23121577 is a deficient number, since it is larger than the sum of its proper divisors (379223).

23121577 is a wasteful number, since it uses less digits than its factorization.

23121577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415.

The product of its digits is 2940, while the sum is 28.

The square root of 23121577 is about 4808.4900956537. The cubic root of 23121577 is about 284.8869029042.

The spelling of 23121577 in words is "twenty-three million, one hundred twenty-one thousand, five hundred seventy-seven".