221565257040742 has 8 divisors (see below), whose sum is σ = 332347999327776. Its totient is φ = 110782590598152.

The previous prime is 221565257040733. The next prime is 221565257040761. The reversal of 221565257040742 is 247040752565122.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221565257040742.

It is a congruent number.

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, 10987153 + ... + 23745484.

It is an arithmetic number, because the mean of its divisors is an integer number (41543499915972).

Almost surely, 2^{221565257040742} is an apocalyptic number.

221565257040742 is a deficient number, since it is larger than the sum of its proper divisors (110782742287034).

221565257040742 is a wasteful number, since it uses less digits than its factorization.

221565257040742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37922222.

The product of its (nonzero) digits is 9408000, while the sum is 52.

The spelling of 221565257040742 in words is "two hundred twenty-one trillion, five hundred sixty-five billion, two hundred fifty-seven million, forty thousand, seven hundred forty-two".