221452774 has 4 divisors (see below), whose sum is σ = 332179164. Its totient is φ = 110726386.

The previous prime is 221452741. The next prime is 221452789. The reversal of 221452774 is 477254122.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×221452774² = 98082662224590152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55363192 + ... + 55363195.

It is an arithmetic number, because the mean of its divisors is an integer number (83044791).

Almost surely, 2^221452774 is an apocalyptic number.

221452774 is a deficient number, since it is larger than the sum of its proper divisors (110726390).

221452774 is a wasteful number, since it uses less digits than its factorization.

221452774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110726389.

The product of its digits is 31360, while the sum is 34.

The square root of 221452774 is about 14881.2893930600. The cubic root of 221452774 is about 605.0069657464.

The spelling of 221452774 in words is "two hundred twenty-one million, four hundred fifty-two thousand, seven hundred seventy-four".