21452261223 has 8 divisors (see below), whose sum is σ = 30285545328. Its totient is φ = 13460242304.

The previous prime is 21452261221. The next prime is 21452261251. The reversal of 21452261223 is 32216225412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21452261223 - 2¹ = 21452261221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452261221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210316236 + ... + 210316337.

It is an arithmetic number, because the mean of its divisors is an integer number (3785693166).

Almost surely, 2^21452261223 is an apocalyptic number.

21452261223 is a deficient number, since it is larger than the sum of its proper divisors (8833284105).

21452261223 is a wasteful number, since it uses less digits than its factorization.

21452261223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420632593.

The product of its digits is 11520, while the sum is 30.

Adding to 21452261223 its reverse (32216225412), we get a palindrome (53668486635).

The spelling of 21452261223 in words is "twenty-one billion, four hundred fifty-two million, two hundred sixty-one thousand, two hundred twenty-three".