221426554 has 8 divisors (see below), whose sum is σ = 332867988. Its totient is φ = 110470560.

The previous prime is 221426507. The next prime is 221426573. The reversal of 221426554 is 455624122.

It can be written as a sum of positive squares in 2 ways, for example, as 220968225 + 458329 = 14865^2 + 677^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120217 + ... + 122044.

Almost surely, 2^221426554 is an apocalyptic number.

221426554 is a deficient number, since it is larger than the sum of its proper divisors (111441434).

221426554 is a wasteful number, since it uses less digits than its factorization.

221426554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242720.

The product of its digits is 19200, while the sum is 31.

The square root of 221426554 is about 14880.4083949333. The cubic root of 221426554 is about 604.9830872034.

The spelling of 221426554 in words is "two hundred twenty-one million, four hundred twenty-six thousand, five hundred fifty-four".