221534413660474 has 8 divisors (see below), whose sum is σ = 332302528534068. Its totient is φ = 110766904149120.

The previous prime is 221534413660463. The next prime is 221534413660481. The reversal of 221534413660474 is 474066314435122.

It can be written as a sum of positive squares in 2 ways, for example, as 159853919922225 + 61680493738249 = 12643335^2 + 7853693^2 .

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

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, 150424567 + ... + 151890154.

Almost surely, 2^{221534413660474} is an apocalyptic number.

221534413660474 is a deficient number, since it is larger than the sum of its proper divisors (110768114873594).

221534413660474 is a wasteful number, since it uses less digits than its factorization.

221534413660474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302681120.

The product of its (nonzero) digits is 11612160, while the sum is 52.

The spelling of 221534413660474 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred thirteen million, six hundred sixty thousand, four hundred seventy-four".