221256133486 has 8 divisors (see below), whose sum is σ = 332650677744. Its totient is φ = 110372574240.

The previous prime is 221256133459. The next prime is 221256133507. The reversal of 221256133486 is 684331652122.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127745170 + ... + 127746901.

It is an arithmetic number, because the mean of its divisors is an integer number (41581334718).

Almost surely, 2^221256133486 is an apocalyptic number.

221256133486 is a deficient number, since it is larger than the sum of its proper divisors (111394544258).

221256133486 is a wasteful number, since it uses less digits than its factorization.

221256133486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255492506.

The product of its digits is 414720, while the sum is 43.

The spelling of 221256133486 in words is "two hundred twenty-one billion, two hundred fifty-six million, one hundred thirty-three thousand, four hundred eighty-six".