221246850402 has 54 divisors (see below), whose sum is σ = 496598008257. Its totient is φ = 71187257232.

The previous prime is 221246850401. The next prime is 221246850479. The reversal of 221246850402 is 204058642122.

221246850402 is a `hidden beast` number, since 2 + 2 + 1 + 246 + 8 + 5 + 0 + 402 = 666.

221246850402 is digitally balanced in base 3, 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 221115312441 + 131537961 = 470229^2 + 11469^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332601.

It is not an unprimeable number, because it can be changed into a prime (221246850401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 57870663 + ... + 57874485.

Almost surely, 2^221246850402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221246850402

221246850402 is an abundant number, since it is smaller than the sum of its proper divisors (275351157855).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221246850402 is an frugal number, since it uses more digits than its factorization.

221246850402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712 (or 3857 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The spelling of 221246850402 in words is "two hundred twenty-one billion, two hundred forty-six million, eight hundred fifty thousand, four hundred two".