221535247346622 has 144 divisors (see below), whose sum is σ = 549885688060800. Its totient is φ = 66794543410320.

The previous prime is 221535247346617. The next prime is 221535247346639. The reversal of 221535247346622 is 226643742535122.

221535247346622 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 3 + 5 + 2 + 4 + 7 + 3 + 4 + 6 + 622 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2237013 + ... + 21167775.

Almost surely, 2^{221535247346622} is an apocalyptic number.

221535247346622 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 221535247346622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274942844030400).

221535247346622 is an abundant number, since it is smaller than the sum of its proper divisors (328350440714178).

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

221535247346622 is a wasteful number, since it uses less digits than its factorization.

221535247346622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18931001 (or 18930978 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 54.

The spelling of 221535247346622 in words is "two hundred twenty-one trillion, five hundred thirty-five billion, two hundred forty-seven million, three hundred forty-six thousand, six hundred twenty-two".