213345723 has 32 divisors (see below), whose sum is σ = 304943616. Its totient is φ = 132374528.

The previous prime is 213345709. The next prime is 213345739. The reversal of 213345723 is 327543312.

It is a cyclic number.

It is not a de Polignac number, because 213345723 - 2¹⁰ = 213344699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213345793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 830011 + ... + 830267.

It is an arithmetic number, because the mean of its divisors is an integer number (9529488).

Almost surely, 2^213345723 is an apocalyptic number.

213345723 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213345723 is a deficient number, since it is larger than the sum of its proper divisors (91597893).

213345723 is a wasteful number, since it uses less digits than its factorization.

213345723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563.

The product of its digits is 15120, while the sum is 30.

The square root of 213345723 is about 14606.3589918912. The cubic root of 213345723 is about 597.5321999652.

The spelling of 213345723 in words is "two hundred thirteen million, three hundred forty-five thousand, seven hundred twenty-three".