23162521 has 2 divisors, whose sum is σ = 23162522. Its totient is φ = 23162520.

The previous prime is 23162519. The next prime is 23162567. The reversal of 23162521 is 12526132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20602521 + 2560000 = 4539^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 23162521 - 2¹ = 23162519 is a prime.

Together with 23162519, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23162492 and 23162501.

It is not a weakly prime, because it can be changed into another prime (23162591) 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, 11581260 + 11581261.

It is an arithmetic number, because the mean of its divisors is an integer number (11581261).

Almost surely, 2^23162521 is an apocalyptic number.

It is an amenable number.

23162521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23162521 is an equidigital number, since it uses as much as digits as its factorization.

23162521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 23162521 is about 4812.7456820406. The cubic root of 23162521 is about 285.0549642631.

Adding to 23162521 its reverse (12526132), we get a palindrome (35688653).

The spelling of 23162521 in words is "twenty-three million, one hundred sixty-two thousand, five hundred twenty-one".