21476522223251 has 4 divisors (see below), whose sum is σ = 21476702618904. Its totient is φ = 21476341827600.

The previous prime is 21476522223223. The next prime is 21476522223259. The reversal of 21476522223251 is 15232222567412.

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 21476522223251 - 2⁶ = 21476522223187 is a prime.

It is a super-2 number, since 2×21476522223251² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21476522223259) 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, 90019130 + ... + 90257391.

It is an arithmetic number, because the mean of its divisors is an integer number (5369175654726).

Almost surely, 2^{21476522223251} is an apocalyptic number.

21476522223251 is a deficient number, since it is larger than the sum of its proper divisors (180395653).

21476522223251 is a wasteful number, since it uses less digits than its factorization.

21476522223251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180395652.

The product of its digits is 806400, while the sum is 44.

The spelling of 21476522223251 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred twenty-two million, two hundred twenty-three thousand, two hundred fifty-one".