23000221521451 has 4 divisors (see below), whose sum is σ = 23001370346304. Its totient is φ = 22999072696600.

The previous prime is 23000221521449. The next prime is 23000221521467. The reversal of 23000221521451 is 15412512200032.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23000221521451 - 2¹ = 23000221521449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23000221525451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574382395 + ... + 574422436.

It is an arithmetic number, because the mean of its divisors is an integer number (5750342586576).

Almost surely, 2^{23000221521451} is an apocalyptic number.

23000221521451 is a deficient number, since it is larger than the sum of its proper divisors (1148824853).

23000221521451 is a wasteful number, since it uses less digits than its factorization.

23000221521451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148824852.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 23000221521451 its reverse (15412512200032), we get a palindrome (38412733721483).

The spelling of 23000221521451 in words is "twenty-three trillion, two hundred twenty-one million, five hundred twenty-one thousand, four hundred fifty-one".