221454404 has 12 divisors (see below), whose sum is σ = 387889404. Its totient is φ = 110628864.

The previous prime is 221454403. The next prime is 221454437. The reversal of 221454404 is 404454122.

It can be written as a sum of positive squares in 2 ways, for example, as 104857600 + 116596804 = 10240^2 + 10798^2 .

It is not an unprimeable number, because it can be changed into a prime (221454403) 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, 19397 + ... + 28620.

It is an arithmetic number, because the mean of its divisors is an integer number (32324117).

Almost surely, 2^221454404 is an apocalyptic number.

It is an amenable number.

221454404 is a deficient number, since it is larger than the sum of its proper divisors (166435000).

221454404 is a wasteful number, since it uses less digits than its factorization.

221454404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49174 (or 49172 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 221454404 is about 14881.3441597189. The cubic root of 221454404 is about 605.0084501244.

The spelling of 221454404 in words is "two hundred twenty-one million, four hundred fifty-four thousand, four hundred four".