221201364 has 24 divisors (see below), whose sum is σ = 527119488. Its totient is φ = 72164800.

The previous prime is 221201359. The next prime is 221201369. The reversal of 221201364 is 463102122.

It is an interprime number because it is at equal distance from previous prime (221201359) and next prime (221201369).

It is a self number, because there is not a number n which added to its sum of digits gives 221201364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195537 + ... + 196664.

It is an arithmetic number, because the mean of its divisors is an integer number (21963312).

Almost surely, 2^221201364 is an apocalyptic number.

It is an amenable number.

221201364 is an abundant number, since it is smaller than the sum of its proper divisors (305918124).

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

221201364 is a wasteful number, since it uses less digits than its factorization.

221201364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392255 (or 392253 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 221201364 is about 14872.8398095320. The cubic root of 221201364 is about 604.7779291063. Note that the first 3 decimals are identical.

Adding to 221201364 its reverse (463102122), we get a palindrome (684303486).

The spelling of 221201364 in words is "two hundred twenty-one million, two hundred one thousand, three hundred sixty-four".