221552408862 has 24 divisors (see below), whose sum is σ = 505294968360. Its totient is φ = 69963918480.

The previous prime is 221552408851. The next prime is 221552408887. The reversal of 221552408862 is 268804255122.

221552408862 is a `hidden beast` number, since 221 + 55 + 240 + 88 + 62 = 666.

It is a super-2 number, since 2×221552408862² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323906689 + ... + 323907372.

It is an arithmetic number, because the mean of its divisors is an integer number (21053957015).

Almost surely, 2^221552408862 is an apocalyptic number.

221552408862 is an abundant number, since it is smaller than the sum of its proper divisors (283742559498).

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

221552408862 is a wasteful number, since it uses less digits than its factorization.

221552408862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647814088 (or 647814085 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 221552408862 in words is "two hundred twenty-one billion, five hundred fifty-two million, four hundred eight thousand, eight hundred sixty-two".