221232036664254 has 384 divisors, whose sum is σ = 568303976217600. Its totient is φ = 56184561100800.

The previous prime is 221232036664217. The next prime is 221232036664319. The reversal of 221232036664254 is 452466630232122.

It is a super-2 number, since 2×221232036664254² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 52461946354 + ... + 52461950570.

It is an arithmetic number, because the mean of its divisors is an integer number (1479958271400).

Almost surely, 2^{221232036664254} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221232036664254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284151988108800).

221232036664254 is an abundant number, since it is smaller than the sum of its proper divisors (347071939553346).

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

221232036664254 is a wasteful number, since it uses less digits than its factorization.

221232036664254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280 (or 5269 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 48.

Adding to 221232036664254 its reverse (452466630232122), we get a palindrome (673698666896376).

The spelling of 221232036664254 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, thirty-six million, six hundred sixty-four thousand, two hundred fifty-four".