221455398342 has 32 divisors (see below), whose sum is σ = 455330110464. Its totient is φ = 71769384000.

The previous prime is 221455398319. The next prime is 221455398347. The reversal of 221455398342 is 243893554122.

It is a junction number, because it is equal to n+sod(n) for n = 221455398291 and 221455398300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221455398347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2557759 + ... + 2642922.

It is an arithmetic number, because the mean of its divisors is an integer number (14229065952).

Almost surely, 2^221455398342 is an apocalyptic number.

221455398342 is an abundant number, since it is smaller than the sum of its proper divisors (233874712122).

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

221455398342 is a wasteful number, since it uses less digits than its factorization.

221455398342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200884.

The product of its digits is 2073600, while the sum is 48.

The spelling of 221455398342 in words is "two hundred twenty-one billion, four hundred fifty-five million, three hundred ninety-eight thousand, three hundred forty-two".