21223272353 has 16 divisors (see below), whose sum is σ = 21976920000. Its totient is φ = 20483576256.

The previous prime is 21223272341. The next prime is 21223272361. The reversal of 21223272353 is 35327232212.

It is a cyclic number.

It is not a de Polignac number, because 21223272353 - 2⁴ = 21223272337 is a prime.

It is a super-2 number, since 2×21223272353² (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 (21223272373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2826398 + ... + 2833896.

It is an arithmetic number, because the mean of its divisors is an integer number (1373557500).

Almost surely, 2^21223272353 is an apocalyptic number.

It is an amenable number.

21223272353 is a deficient number, since it is larger than the sum of its proper divisors (753647647).

21223272353 is an equidigital number, since it uses as much as digits as its factorization.

21223272353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8416.

The product of its digits is 30240, while the sum is 32.

The spelling of 21223272353 in words is "twenty-one billion, two hundred twenty-three million, two hundred seventy-two thousand, three hundred fifty-three".