23215213266 has 32 divisors (see below), whose sum is σ = 53079318528. Its totient is φ = 6630921360.

The previous prime is 23215213253. The next prime is 23215213267. The reversal of 23215213266 is 66231251232.

It is a happy number.

It is a super-2 number, since 2×23215213266² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23215213267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60921 + ... + 223923.

It is an arithmetic number, because the mean of its divisors is an integer number (1658728704).

Almost surely, 2^23215213266 is an apocalyptic number.

23215213266 is an abundant number, since it is smaller than the sum of its proper divisors (29864105262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23215213266 is a wasteful number, since it uses less digits than its factorization.

23215213266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166406.

The product of its digits is 25920, while the sum is 33.

Adding to 23215213266 its reverse (66231251232), we get a palindrome (89446464498).

The spelling of 23215213266 in words is "twenty-three billion, two hundred fifteen million, two hundred thirteen thousand, two hundred sixty-six".