213945346 has 4 divisors (see below), whose sum is σ = 320918022. Its totient is φ = 106972672.

The previous prime is 213945341. The next prime is 213945373. The reversal of 213945346 is 643549312.

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

It can be written as a sum of positive squares in only one way, i.e., 203775625 + 10169721 = 14275^2 + 3189^2 .

It is a super-2 number, since 2×213945346² = 91545222150119432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213945341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53486335 + ... + 53486338.

Almost surely, 2^213945346 is an apocalyptic number.

213945346 is a deficient number, since it is larger than the sum of its proper divisors (106972676).

213945346 is a wasteful number, since it uses less digits than its factorization.

213945346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106972675.

The product of its digits is 77760, while the sum is 37.

The square root of 213945346 is about 14626.8706837792. The cubic root of 213945346 is about 598.0914782707.

The spelling of 213945346 in words is "two hundred thirteen million, nine hundred forty-five thousand, three hundred forty-six".