221557070446 has 8 divisors (see below), whose sum is σ = 332500870584. Its totient is φ = 110723446920.

The previous prime is 221557070443. The next prime is 221557070479. The reversal of 221557070446 is 644070755122.

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

It is a super-2 number, since 2×221557070446² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221557070443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27539125 + ... + 27547168.

It is an arithmetic number, because the mean of its divisors is an integer number (41562608823).

Almost surely, 2^221557070446 is an apocalyptic number.

221557070446 is a deficient number, since it is larger than the sum of its proper divisors (110943800138).

221557070446 is a wasteful number, since it uses less digits than its factorization.

221557070446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55088306.

The product of its (nonzero) digits is 470400, while the sum is 43.

The spelling of 221557070446 in words is "two hundred twenty-one billion, five hundred fifty-seven million, seventy thousand, four hundred forty-six".