221530205456470 has 16 divisors (see below), whose sum is σ = 398756126767680. Its totient is φ = 88611691750144.

The previous prime is 221530205456459. The next prime is 221530205456489. The reversal of 221530205456470 is 74654502035122.

It is a super-2 number, since 2×221530205456470² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221530205456470.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46415422 + ... + 50965201.

It is an arithmetic number, because the mean of its divisors is an integer number (24922257922980).

Almost surely, 2^{221530205456470} is an apocalyptic number.

221530205456470 is a deficient number, since it is larger than the sum of its proper divisors (177225921311210).

221530205456470 is a wasteful number, since it uses less digits than its factorization.

221530205456470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97608119.

The product of its (nonzero) digits is 2016000, while the sum is 46.

The spelling of 221530205456470 in words is "two hundred twenty-one trillion, five hundred thirty billion, two hundred five million, four hundred fifty-six thousand, four hundred seventy".