221013047 has 2 divisors, whose sum is σ = 221013048. Its totient is φ = 221013046.

The previous prime is 221013029. The next prime is 221013053. The reversal of 221013047 is 740310122.

221013047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221013047 - 2¹⁸ = 220750903 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221013017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506523 + 110506524.

It is an arithmetic number, because the mean of its divisors is an integer number (110506524).

Almost surely, 2^221013047 is an apocalyptic number.

221013047 is a deficient number, since it is larger than the sum of its proper divisors (1).

221013047 is an equidigital number, since it uses as much as digits as its factorization.

221013047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 221013047 is about 14866.5075589393. The cubic root of 221013047 is about 604.6062570181.

Adding to 221013047 its reverse (740310122), we get a palindrome (961323169).

The spelling of 221013047 in words is "two hundred twenty-one million, thirteen thousand, forty-seven".