23151533 has 2 divisors, whose sum is σ = 23151534. Its totient is φ = 23151532.

The previous prime is 23151521. The next prime is 23151539. The reversal of 23151533 is 33515132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14845609 + 8305924 = 3853^2 + 2882^2 .

It is a cyclic number.

It is not a de Polignac number, because 23151533 - 2⁴ = 23151517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23151499 and 23151508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23151539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11575766 + 11575767.

It is an arithmetic number, because the mean of its divisors is an integer number (11575767).

Almost surely, 2^23151533 is an apocalyptic number.

It is an amenable number.

23151533 is a deficient number, since it is larger than the sum of its proper divisors (1).

23151533 is an equidigital number, since it uses as much as digits as its factorization.

23151533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 23.

The square root of 23151533 is about 4811.6039945116. The cubic root of 23151533 is about 285.0098816724.

Adding to 23151533 its reverse (33515132), we get a palindrome (56666665).

The spelling of 23151533 in words is "twenty-three million, one hundred fifty-one thousand, five hundred thirty-three".