221274851 has 8 divisors (see below), whose sum is σ = 254817024. Its totient is φ = 188215560.

The previous prime is 221274821. The next prime is 221274857. The reversal of 221274851 is 158472122.

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

It is not a de Polignac number, because 221274851 - 2¹⁸ = 221012707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221274857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119735 + ... + 121568.

It is an arithmetic number, because the mean of its divisors is an integer number (31852128).

Almost surely, 2^221274851 is an apocalyptic number.

221274851 is a deficient number, since it is larger than the sum of its proper divisors (33542173).

221274851 is a wasteful number, since it uses less digits than its factorization.

221274851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241441.

The product of its digits is 8960, while the sum is 32.

The square root of 221274851 is about 14875.3101144144. The cubic root of 221274851 is about 604.8448943277.

The spelling of 221274851 in words is "two hundred twenty-one million, two hundred seventy-four thousand, eight hundred fifty-one".