221046239 has 2 divisors, whose sum is σ = 221046240. Its totient is φ = 221046238.

The previous prime is 221046191. The next prime is 221046253. The reversal of 221046239 is 932640122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221046239 is a prime.

It is a super-2 number, since 2×221046239² = 97722879552090242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221046269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110523119 + 110523120.

It is an arithmetic number, because the mean of its divisors is an integer number (110523120).

Almost surely, 2^221046239 is an apocalyptic number.

221046239 is a deficient number, since it is larger than the sum of its proper divisors (1).

221046239 is an equidigital number, since it uses as much as digits as its factorization.

221046239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 221046239 is about 14867.6238518467. The cubic root of 221046239 is about 604.6365223299.

The spelling of 221046239 in words is "two hundred twenty-one million, forty-six thousand, two hundred thirty-nine".