221534403655136 has 96 divisors (see below), whose sum is σ = 512415931452768. Its totient is φ = 92947725066240.

The previous prime is 221534403655129. The next prime is 221534403655141. The reversal of 221534403655136 is 631556304435122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113214860 + ... + 115154996.

It is an arithmetic number, because the mean of its divisors is an integer number (5337665952633).

Almost surely, 2^{221534403655136} is an apocalyptic number.

221534403655136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221534403655136 is an abundant number, since it is smaller than the sum of its proper divisors (290881527797632).

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

221534403655136 is a wasteful number, since it uses less digits than its factorization.

221534403655136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965124 (or 1965116 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 50.

The spelling of 221534403655136 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred three million, six hundred fifty-five thousand, one hundred thirty-six".