221145365504 has 88 divisors (see below), whose sum is σ = 534947914080. Its totient is φ = 89201442816.

The previous prime is 221145365429. The next prime is 221145365509. The reversal of 221145365504 is 405563541122.

It is a super-3 number, since 3×221145365504³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221145365509) 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, 785549 + ... + 1029260.

Almost surely, 2^221145365504 is an apocalyptic number.

It is an amenable number.

221145365504 is an abundant number, since it is smaller than the sum of its proper divisors (313802548576).

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

221145365504 is a wasteful number, since it uses less digits than its factorization.

221145365504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814853 (or 1814835 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 221145365504 in words is "two hundred twenty-one billion, one hundred forty-five million, three hundred sixty-five thousand, five hundred four".