213644446 has 4 divisors (see below), whose sum is σ = 320466672. Its totient is φ = 106822222.

The previous prime is 213644437. The next prime is 213644461. The reversal of 213644446 is 644446312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53411110 + ... + 53411113.

It is an arithmetic number, because the mean of its divisors is an integer number (80116668).

Almost surely, 2^213644446 is an apocalyptic number.

213644446 is a deficient number, since it is larger than the sum of its proper divisors (106822226).

213644446 is a wasteful number, since it uses less digits than its factorization.

213644446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106822225.

The product of its digits is 55296, while the sum is 34.

The square root of 213644446 is about 14616.5812008144. The cubic root of 213644446 is about 597.8109546617.

The spelling of 213644446 in words is "two hundred thirteen million, six hundred forty-four thousand, four hundred forty-six".