221626426630451 has 8 divisors (see below), whose sum is σ = 221684017577904. Its totient is φ = 221568838420480.

The previous prime is 221626426630403. The next prime is 221626426630501. The reversal of 221626426630451 is 154036624626122.

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 221626426630451 - 2¹⁴ = 221626426614067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221626426630451.

It is not an unprimeable number, because it can be changed into a prime (221626426639451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166549895 + ... + 167875311.

It is an arithmetic number, because the mean of its divisors is an integer number (27710502197238).

Almost surely, 2^{221626426630451} is an apocalyptic number.

221626426630451 is a deficient number, since it is larger than the sum of its proper divisors (57590947453).

221626426630451 is a wasteful number, since it uses less digits than its factorization.

221626426630451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368741.

The product of its (nonzero) digits is 4976640, while the sum is 50.

The spelling of 221626426630451 in words is "two hundred twenty-one trillion, six hundred twenty-six billion, four hundred twenty-six million, six hundred thirty thousand, four hundred fifty-one".