213226837 has 2 divisors, whose sum is σ = 213226838. Its totient is φ = 213226836.

The previous prime is 213226831. The next prime is 213226843. The reversal of 213226837 is 738622312.

It is a balanced prime because it is at equal distance from previous prime (213226831) and next prime (213226843).

It can be written as a sum of positive squares in only one way, i.e., 213189201 + 37636 = 14601^2 + 194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213226837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213226831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106613418 + 106613419.

It is an arithmetic number, because the mean of its divisors is an integer number (106613419).

Almost surely, 2^213226837 is an apocalyptic number.

It is an amenable number.

213226837 is a deficient number, since it is larger than the sum of its proper divisors (1).

213226837 is an equidigital number, since it uses as much as digits as its factorization.

213226837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 213226837 is about 14602.2887589583. The cubic root of 213226837 is about 597.4211885804.

The spelling of 213226837 in words is "two hundred thirteen million, two hundred twenty-six thousand, eight hundred thirty-seven".