221451450 has 48 divisors (see below), whose sum is σ = 599131296. Its totient is φ = 53684800.

The previous prime is 221451449. The next prime is 221451487. The reversal of 221451450 is 54154122.

221451450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221451450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65457 + ... + 68756.

It is an arithmetic number, because the mean of its divisors is an integer number (12481902).

Almost surely, 2^221451450 is an apocalyptic number.

221451450 is an abundant number, since it is smaller than the sum of its proper divisors (377679846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221451450 is a wasteful number, since it uses less digits than its factorization.

221451450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134239 (or 134234 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 221451450 is about 14881.2449076010. The cubic root of 221451450 is about 605.0057600253.

The spelling of 221451450 in words is "two hundred twenty-one million, four hundred fifty-one thousand, four hundred fifty".