23209051 has 12 divisors (see below), whose sum is σ = 24688800. Its totient is φ = 21814128.

The previous prime is 23209031. The next prime is 23209057. The reversal of 23209051 is 15090232.

It is not a de Polignac number, because 23209051 - 2¹⁷ = 23077979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23209057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86145 + ... + 86413.

It is an arithmetic number, because the mean of its divisors is an integer number (2057400).

Almost surely, 2^23209051 is an apocalyptic number.

23209051 is a deficient number, since it is larger than the sum of its proper divisors (1479749).

23209051 is a wasteful number, since it uses less digits than its factorization.

23209051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 23209051 is about 4817.5772956954. The cubic root of 23209051 is about 285.2457140216.

Adding to 23209051 its reverse (15090232), we get a palindrome (38299283).

The spelling of 23209051 in words is "twenty-three million, two hundred nine thousand, fifty-one".