221473734 has 16 divisors (see below), whose sum is σ = 457236480. Its totient is φ = 71443080.

The previous prime is 221473727. The next prime is 221473757. The reversal of 221473734 is 437374122.

It is a super-2 number, since 2×221473734² = 98101229703805512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221473695 and 221473704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595174 + ... + 595545.

It is an arithmetic number, because the mean of its divisors is an integer number (28577280).

Almost surely, 2^221473734 is an apocalyptic number.

221473734 is an abundant number, since it is smaller than the sum of its proper divisors (235762746).

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

221473734 is a wasteful number, since it uses less digits than its factorization.

221473734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190755.

The product of its digits is 28224, while the sum is 33.

The square root of 221473734 is about 14881.9936164480. The cubic root of 221473734 is about 605.0260526540.

The spelling of 221473734 in words is "two hundred twenty-one million, four hundred seventy-three thousand, seven hundred thirty-four".