221240232055 has 8 divisors (see below), whose sum is σ = 265490884800. Its totient is φ = 176990448096.

The previous prime is 221240232043. The next prime is 221240232119. The reversal of 221240232055 is 550232042122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221240232055 - 2¹⁵ = 221240199287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679906 + ... + 951184.

It is an arithmetic number, because the mean of its divisors is an integer number (33186360600).

Almost surely, 2^221240232055 is an apocalyptic number.

221240232055 is a deficient number, since it is larger than the sum of its proper divisors (44250652745).

221240232055 is a wasteful number, since it uses less digits than its factorization.

221240232055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434393.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 221240232055 its reverse (550232042122), we get a palindrome (771472274177).

The spelling of 221240232055 in words is "two hundred twenty-one billion, two hundred forty million, two hundred thirty-two thousand, fifty-five".