220251247 has 2 divisors, whose sum is σ = 220251248. Its totient is φ = 220251246.

The previous prime is 220251223. The next prime is 220251253. The reversal of 220251247 is 742152022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220251247 - 2¹¹ = 220249199 is a prime.

It is a super-2 number, since 2×220251247² = 97021223610110018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220251277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110125623 + 110125624.

It is an arithmetic number, because the mean of its divisors is an integer number (110125624).

Almost surely, 2^220251247 is an apocalyptic number.

220251247 is a deficient number, since it is larger than the sum of its proper divisors (1).

220251247 is an equidigital number, since it uses as much as digits as its factorization.

220251247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 220251247 is about 14840.8640920938. The cubic root of 220251247 is about 603.9107939174.

The spelling of 220251247 in words is "two hundred twenty million, two hundred fifty-one thousand, two hundred forty-seven".