221550463 has 2 divisors, whose sum is σ = 221550464. Its totient is φ = 221550462.

The previous prime is 221550451. The next prime is 221550479. The reversal of 221550463 is 364055122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221550463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221550403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110775231 + 110775232.

It is an arithmetic number, because the mean of its divisors is an integer number (110775232).

Almost surely, 2^221550463 is an apocalyptic number.

221550463 is a deficient number, since it is larger than the sum of its proper divisors (1).

221550463 is an equidigital number, since it uses as much as digits as its factorization.

221550463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 221550463 is about 14884.5713072295. The cubic root of 221550463 is about 605.0959144884.

The spelling of 221550463 in words is "two hundred twenty-one million, five hundred fifty thousand, four hundred sixty-three".