221150451 has 16 divisors (see below), whose sum is σ = 312286464. Its totient is φ = 138915744.

The previous prime is 221150441. The next prime is 221150453. The reversal of 221150451 is 154051122.

It is not a de Polignac number, because 221150451 - 2⁷ = 221150323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221150453) 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, 19296 + ... + 28541.

It is an arithmetic number, because the mean of its divisors is an integer number (19517904).

Almost surely, 2^221150451 is an apocalyptic number.

221150451 is a deficient number, since it is larger than the sum of its proper divisors (91136013).

221150451 is a wasteful number, since it uses less digits than its factorization.

221150451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47930.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 221150451 is about 14871.1281011227. The cubic root of 221150451 is about 604.7315258039.

The spelling of 221150451 in words is "two hundred twenty-one million, one hundred fifty thousand, four hundred fifty-one".