220766831 has 2 divisors, whose sum is σ = 220766832. Its totient is φ = 220766830.

The previous prime is 220766797. The next prime is 220766851. The reversal of 220766831 is 138667022.

It is a happy number.

220766831 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 a de Polignac number, because none of the positive numbers 2^k-220766831 is a prime.

It is a super-2 number, since 2×220766831² = 97475987339565122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220766791 and 220766800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220766851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110383415 + 110383416.

It is an arithmetic number, because the mean of its divisors is an integer number (110383416).

Almost surely, 2^220766831 is an apocalyptic number.

220766831 is a deficient number, since it is larger than the sum of its proper divisors (1).

220766831 is an equidigital number, since it uses as much as digits as its factorization.

220766831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 220766831 is about 14858.2243555547. The cubic root of 220766831 is about 604.3816563287.

The spelling of 220766831 in words is "two hundred twenty million, seven hundred sixty-six thousand, eight hundred thirty-one".