23221276387 has 4 divisors (see below), whose sum is σ = 23223007080. Its totient is φ = 23219545696.

The previous prime is 23221276381. The next prime is 23221276499. The reversal of 23221276387 is 78367212232.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23221276387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23221276381) 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, 845062 + ... + 872107.

It is an arithmetic number, because the mean of its divisors is an integer number (5805751770).

Almost surely, 2^23221276387 is an apocalyptic number.

23221276387 is a deficient number, since it is larger than the sum of its proper divisors (1730693).

23221276387 is a wasteful number, since it uses less digits than its factorization.

23221276387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730692.

The product of its digits is 338688, while the sum is 43.

The spelling of 23221276387 in words is "twenty-three billion, two hundred twenty-one million, two hundred seventy-six thousand, three hundred eighty-seven".