23213651 has 2 divisors, whose sum is σ = 23213652. Its totient is φ = 23213650.

The previous prime is 23213639. The next prime is 23213657. The reversal of 23213651 is 15631232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23213651 - 2¹⁰ = 23212627 is a prime.

It is not a weakly prime, because it can be changed into another prime (23213657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606825 + 11606826.

It is an arithmetic number, because the mean of its divisors is an integer number (11606826).

Almost surely, 2^23213651 is an apocalyptic number.

23213651 is a deficient number, since it is larger than the sum of its proper divisors (1).

23213651 is an equidigital number, since it uses as much as digits as its factorization.

23213651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 23213651 is about 4818.0546904326. The cubic root of 23213651 is about 285.2645578713.

Adding to 23213651 its reverse (15631232), we get a palindrome (38844883).

The spelling of 23213651 in words is "twenty-three million, two hundred thirteen thousand, six hundred fifty-one".