213864751 has 2 divisors, whose sum is σ = 213864752. Its totient is φ = 213864750.

The previous prime is 213864661. The next prime is 213864767. The reversal of 213864751 is 157468312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213864751 - 2¹⁵ = 213831983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213864751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213864151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106932375 + 106932376.

It is an arithmetic number, because the mean of its divisors is an integer number (106932376).

Almost surely, 2^213864751 is an apocalyptic number.

213864751 is a deficient number, since it is larger than the sum of its proper divisors (1).

213864751 is an equidigital number, since it uses as much as digits as its factorization.

213864751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 213864751 is about 14624.1153920502. The cubic root of 213864751 is about 598.0163668186.

The spelling of 213864751 in words is "two hundred thirteen million, eight hundred sixty-four thousand, seven hundred fifty-one".