221534407773740 has 24 divisors (see below), whose sum is σ = 466689834433872. Its totient is φ = 88334224422080.

The previous prime is 221534407773739. The next prime is 221534407773743. The reversal of 221534407773740 is 47377704435122.

It is not an unprimeable number, because it can be changed into a prime (221534407773743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17471161466 + ... + 17471174145.

It is an arithmetic number, because the mean of its divisors is an integer number (19445409768078).

Almost surely, 2^{221534407773740} is an apocalyptic number.

221534407773740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221534407773740 is an abundant number, since it is smaller than the sum of its proper divisors (245155426660132).

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

221534407773740 is a wasteful number, since it uses less digits than its factorization.

221534407773740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34942335937 (or 34942335935 counting only the distinct ones).

The product of its (nonzero) digits is 27659520, while the sum is 56.

The spelling of 221534407773740 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred seven million, seven hundred seventy-three thousand, seven hundred forty".