23021569 has 4 divisors (see below), whose sum is σ = 23037696. Its totient is φ = 23005444.

The previous prime is 23021567. The next prime is 23021639. The reversal of 23021569 is 96512032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23021569 - 2¹ = 23021567 is a prime.

It is a super-2 number, since 2×23021569² = 1059985278443522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23021567) 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, 5689 + ... + 8854.

It is an arithmetic number, because the mean of its divisors is an integer number (5759424).

Almost surely, 2^23021569 is an apocalyptic number.

It is an amenable number.

23021569 is a deficient number, since it is larger than the sum of its proper divisors (16127).

23021569 is a wasteful number, since it uses less digits than its factorization.

23021569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16126.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 23021569 is about 4798.0797200547. The cubic root of 23021569 is about 284.4755678439.

The spelling of 23021569 in words is "twenty-three million, twenty-one thousand, five hundred sixty-nine".