21226607243 has 8 divisors (see below), whose sum is σ = 21388371600. Its totient is φ = 21064942080.

The previous prime is 21226607231. The next prime is 21226607257. The reversal of 21226607243 is 34270662212.

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 21226607243 - 2⁸ = 21226606987 is a prime.

It is a super-2 number, since 2×21226607243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21226607263) 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, 437408 + ... + 483506.

It is an arithmetic number, because the mean of its divisors is an integer number (2673546450).

Almost surely, 2^21226607243 is an apocalyptic number.

21226607243 is a deficient number, since it is larger than the sum of its proper divisors (161764357).

21226607243 is a wasteful number, since it uses less digits than its factorization.

21226607243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49597.

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 21226607243 in words is "twenty-one billion, two hundred twenty-six million, six hundred seven thousand, two hundred forty-three".