221457204674 has 8 divisors (see below), whose sum is σ = 336736297740. Its totient is φ = 109211772096.

The previous prime is 221457204667. The next prime is 221457204679. The reversal of 221457204674 is 476402754122.

221457204674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 218877072649 + 2580132025 = 467843^2 + 50795^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221457204679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758414939 + ... + 758415230.

Almost surely, 2^221457204674 is an apocalyptic number.

221457204674 is a deficient number, since it is larger than the sum of its proper divisors (115279093066).

221457204674 is a wasteful number, since it uses less digits than its factorization.

221457204674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516830244.

The product of its (nonzero) digits is 752640, while the sum is 44.

Adding to 221457204674 its reverse (476402754122), we get a palindrome (697859958796).

The spelling of 221457204674 in words is "two hundred twenty-one billion, four hundred fifty-seven million, two hundred four thousand, six hundred seventy-four".