213546644 has 12 divisors (see below), whose sum is σ = 374767764. Its totient is φ = 106470144.

The previous prime is 213546617. The next prime is 213546659. The reversal of 213546644 is 446645312.

It can be written as a sum of positive squares in 2 ways, for example, as 89491600 + 124055044 = 9460^2 + 11138^2 .

It is a congruent number.

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, 74207 + ... + 77030.

It is an arithmetic number, because the mean of its divisors is an integer number (31230647).

Almost surely, 2^213546644 is an apocalyptic number.

It is an amenable number.

213546644 is a deficient number, since it is larger than the sum of its proper divisors (161221120).

213546644 is a wasteful number, since it uses less digits than its factorization.

213546644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151594 (or 151592 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 213546644 is about 14613.2352338556. The cubic root of 213546644 is about 597.7197189162.

The spelling of 213546644 in words is "two hundred thirteen million, five hundred forty-six thousand, six hundred forty-four".