221364647442 has 40 divisors (see below), whose sum is σ = 522127148400. Its totient is φ = 69904624536.

The previous prime is 221364647431. The next prime is 221364647477. The reversal of 221364647442 is 244746463122.

221364647442 is a `hidden beast` number, since 2 + 2 + 136 + 4 + 6 + 474 + 42 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35956092 + ... + 35962247.

It is an arithmetic number, because the mean of its divisors is an integer number (13053178710).

Almost surely, 2^221364647442 is an apocalyptic number.

221364647442 is an abundant number, since it is smaller than the sum of its proper divisors (300762500958).

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

221364647442 is a wasteful number, since it uses less digits than its factorization.

221364647442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71918372 (or 71918363 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 45.

The spelling of 221364647442 in words is "two hundred twenty-one billion, three hundred sixty-four million, six hundred forty-seven thousand, four hundred forty-two".