23011553 has 2 divisors, whose sum is σ = 23011554. Its totient is φ = 23011552.

The previous prime is 23011543. The next prime is 23011559. The reversal of 23011553 is 35511032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22733824 + 277729 = 4768^2 + 527^2 .

It is a cyclic number.

It is not a de Polignac number, because 23011553 - 2¹⁸ = 22749409 is a prime.

It is not a weakly prime, because it can be changed into another prime (23011559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11505776 + 11505777.

It is an arithmetic number, because the mean of its divisors is an integer number (11505777).

Almost surely, 2^23011553 is an apocalyptic number.

It is an amenable number.

23011553 is a deficient number, since it is larger than the sum of its proper divisors (1).

23011553 is an equidigital number, since it uses as much as digits as its factorization.

23011553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 23011553 is about 4797.0358556092. The cubic root of 23011553 is about 284.4343062397.

Adding to 23011553 its reverse (35511032), we get a palindrome (58522585).

The spelling of 23011553 in words is "twenty-three million, eleven thousand, five hundred fifty-three".