213427943 has 4 divisors (see below), whose sum is σ = 215999448. Its totient is φ = 210856440.

The previous prime is 213427933. The next prime is 213427961. The reversal of 213427943 is 349724312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213427943 - 2⁴ = 213427927 is a prime.

It is a super-2 number, since 2×213427943² = 91102973706422498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213427933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285628 + ... + 1285793.

It is an arithmetic number, because the mean of its divisors is an integer number (53999862).

Almost surely, 2^213427943 is an apocalyptic number.

213427943 is a deficient number, since it is larger than the sum of its proper divisors (2571505).

213427943 is an equidigital number, since it uses as much as digits as its factorization.

213427943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571504.

The product of its digits is 36288, while the sum is 35.

The square root of 213427943 is about 14609.1732483396. The cubic root of 213427943 is about 597.6089498635.

The spelling of 213427943 in words is "two hundred thirteen million, four hundred twenty-seven thousand, nine hundred forty-three".