221476274136 has 128 divisors (see below), whose sum is σ = 662879448000. Its totient is φ = 68111207424.

The previous prime is 221476274113. The next prime is 221476274137. The reversal of 221476274136 is 631472674122.

221476274136 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 7 + 627 + 4 + 13 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 221476274091 and 221476274100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221476274137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5677996 + ... + 5716868.

Almost surely, 2^221476274136 is an apocalyptic number.

221476274136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221476274136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331439724000).

221476274136 is an abundant number, since it is smaller than the sum of its proper divisors (441403173864).

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

221476274136 is a wasteful number, since it uses less digits than its factorization.

221476274136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40930 (or 40920 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The spelling of 221476274136 in words is "two hundred twenty-one billion, four hundred seventy-six million, two hundred seventy-four thousand, one hundred thirty-six".