23321211455 has 4 divisors (see below), whose sum is σ = 27985453752. Its totient is φ = 18656969160.

The previous prime is 23321211451. The next prime is 23321211467. The reversal of 23321211455 is 55411212332.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23321211455 - 2² = 23321211451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23321211451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2332121141 + ... + 2332121150.

It is an arithmetic number, because the mean of its divisors is an integer number (6996363438).

Almost surely, 2^23321211455 is an apocalyptic number.

23321211455 is a deficient number, since it is larger than the sum of its proper divisors (4664242297).

23321211455 is an equidigital number, since it uses as much as digits as its factorization.

23321211455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664242296.

The product of its digits is 7200, while the sum is 29.

Adding to 23321211455 its reverse (55411212332), we get a palindrome (78732423787).

The spelling of 23321211455 in words is "twenty-three billion, three hundred twenty-one million, two hundred eleven thousand, four hundred fifty-five".