213023144 has 8 divisors (see below), whose sum is σ = 399418410. Its totient is φ = 106511568.

The previous prime is 213023143. The next prime is 213023149. The reversal of 213023144 is 441320312.

213023144 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 only one way, i.e., 200562244 + 12460900 = 14162^2 + 3530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (213023143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13313939 + ... + 13313954.

Almost surely, 2^213023144 is an apocalyptic number.

It is an amenable number.

213023144 is a deficient number, since it is larger than the sum of its proper divisors (186395266).

213023144 is a wasteful number, since it uses less digits than its factorization.

213023144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26627899 (or 26627895 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 213023144 is about 14595.3123981640. The cubic root of 213023144 is about 597.2308915767.

Adding to 213023144 its reverse (441320312), we get a palindrome (654343456).

The spelling of 213023144 in words is "two hundred thirteen million, twenty-three thousand, one hundred forty-four".