213073444 has 12 divisors (see below), whose sum is σ = 394812684. Its totient is φ = 100269824.

The previous prime is 213073423. The next prime is 213073451. The reversal of 213073444 is 444370312.

213073444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 154703844 + 58369600 = 12438^2 + 7640^2 .

It is a super-2 number, since 2×213073444² = 90800585076042272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566649 + ... + 1566784.

It is an arithmetic number, because the mean of its divisors is an integer number (32901057).

Almost surely, 2^213073444 is an apocalyptic number.

It is an amenable number.

213073444 is a deficient number, since it is larger than the sum of its proper divisors (181739240).

213073444 is a wasteful number, since it uses less digits than its factorization.

213073444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133454 (or 3133452 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 213073444 is about 14597.0354524472. The cubic root of 213073444 is about 597.2778948414.

The spelling of 213073444 in words is "two hundred thirteen million, seventy-three thousand, four hundred forty-four".