221042231758 has 4 divisors (see below), whose sum is σ = 331563347640. Its totient is φ = 110521115878.

The previous prime is 221042231743. The next prime is 221042231759. The reversal of 221042231758 is 857132240122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 857132240122 = 2 ⋅428566120061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221042231759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55260557938 + ... + 55260557941.

It is an arithmetic number, because the mean of its divisors is an integer number (82890836910).

Almost surely, 2^221042231758 is an apocalyptic number.

221042231758 is a deficient number, since it is larger than the sum of its proper divisors (110521115882).

221042231758 is a wasteful number, since it uses less digits than its factorization.

221042231758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110521115881.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 221042231758 in words is "two hundred twenty-one billion, forty-two million, two hundred thirty-one thousand, seven hundred fifty-eight".