213243373 has 16 divisors (see below), whose sum is σ = 258483456. Its totient is φ = 171959040.

The previous prime is 213243367. The next prime is 213243383. The reversal of 213243373 is 373342312.

It is not a de Polignac number, because 213243373 - 2⁵ = 213243341 is a prime.

It is a super-2 number, since 2×213243373² = 90945472256834258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213243343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036 + ... + 20677.

It is an arithmetic number, because the mean of its divisors is an integer number (16155216).

Almost surely, 2^213243373 is an apocalyptic number.

213243373 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

213243373 is a deficient number, since it is larger than the sum of its proper divisors (45240083).

213243373 is a wasteful number, since it uses less digits than its factorization.

213243373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21804.

The product of its digits is 9072, while the sum is 28.

The square root of 213243373 is about 14602.8549605890. The cubic root of 213243373 is about 597.4366317606.

Adding to 213243373 its reverse (373342312), we get a palindrome (586585685).

The spelling of 213243373 in words is "two hundred thirteen million, two hundred forty-three thousand, three hundred seventy-three".