213120644 has 24 divisors (see below), whose sum is σ = 428282400. Its totient is φ = 91774080.

The previous prime is 213120643. The next prime is 213120659. The reversal of 213120644 is 446021312.

It is not an unprimeable number, because it can be changed into a prime (213120643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126629 + ... + 128300.

It is an arithmetic number, because the mean of its divisors is an integer number (17845100).

Almost surely, 2^213120644 is an apocalyptic number.

It is an amenable number.

213120644 is an abundant number, since it is smaller than the sum of its proper divisors (215161756).

213120644 is a wasteful number, since it uses less digits than its factorization.

213120644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254963 (or 254961 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 213120644 is about 14598.6521295632. The cubic root of 213120644 is about 597.3219945576.

Adding to 213120644 its reverse (446021312), we get a palindrome (659141956).

The spelling of 213120644 in words is "two hundred thirteen million, one hundred twenty thousand, six hundred forty-four".