213402623 has 12 divisors (see below), whose sum is σ = 257403600. Its totient is φ = 173287296.

The previous prime is 213402617. The next prime is 213402689. The reversal of 213402623 is 326204312.

It is not a de Polignac number, because 213402623 - 2¹⁰ = 213401599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213402613) 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 in 11 ways as a sum of consecutive naturals, for example, 39698 + ... + 44751.

It is an arithmetic number, because the mean of its divisors is an integer number (21450300).

Almost surely, 2^213402623 is an apocalyptic number.

213402623 is a deficient number, since it is larger than the sum of its proper divisors (44000977).

213402623 is an equidigital number, since it uses as much as digits as its factorization.

213402623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84494 (or 84475 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 213402623 is about 14608.3066438243. The cubic root of 213402623 is about 597.5853165054.

Adding to 213402623 its reverse (326204312), we get a palindrome (539606935).

The spelling of 213402623 in words is "two hundred thirteen million, four hundred two thousand, six hundred twenty-three".