213266623 has 2 divisors, whose sum is σ = 213266624. Its totient is φ = 213266622.

The previous prime is 213266593. The next prime is 213266629. The reversal of 213266623 is 326662312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213266623 - 2¹⁷ = 213135551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213266629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106633311 + 106633312.

It is an arithmetic number, because the mean of its divisors is an integer number (106633312).

Almost surely, 2^213266623 is an apocalyptic number.

213266623 is a deficient number, since it is larger than the sum of its proper divisors (1).

213266623 is an equidigital number, since it uses as much as digits as its factorization.

213266623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 213266623 is about 14603.6510160987. The cubic root of 213266623 is about 597.4583438802.

The spelling of 213266623 in words is "two hundred thirteen million, two hundred sixty-six thousand, six hundred twenty-three".