23214509 has 2 divisors, whose sum is σ = 23214510. Its totient is φ = 23214508.

The previous prime is 23214481. The next prime is 23214533. The reversal of 23214509 is 90541232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19333609 + 3880900 = 4397^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 23214509 - 2²⁰ = 22165933 is a prime.

It is a super-2 number, since 2×23214509² = 1077826856222162, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23214559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11607254 + 11607255.

It is an arithmetic number, because the mean of its divisors is an integer number (11607255).

Almost surely, 2^23214509 is an apocalyptic number.

It is an amenable number.

23214509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23214509 is an equidigital number, since it uses as much as digits as its factorization.

23214509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 23214509 is about 4818.1437296951. The cubic root of 23214509 is about 285.2680723835.

It can be divided in two parts, 232 and 14509, that added together give a palindrome (14741).

The spelling of 23214509 in words is "twenty-three million, two hundred fourteen thousand, five hundred nine".