213929944 has 16 divisors (see below), whose sum is σ = 401325120. Its totient is φ = 106909920.

The previous prime is 213929941. The next prime is 213929951. The reversal of 213929944 is 449929312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 213929944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213929941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13017 + ... + 24439.

It is an arithmetic number, because the mean of its divisors is an integer number (25082820).

Almost surely, 2^213929944 is an apocalyptic number.

It is an amenable number.

213929944 is a deficient number, since it is larger than the sum of its proper divisors (187395176).

213929944 is a wasteful number, since it uses less digits than its factorization.

213929944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13770 (or 13766 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 213929944 is about 14626.3441775448. The cubic root of 213929944 is about 598.0771256550.

The spelling of 213929944 in words is "two hundred thirteen million, nine hundred twenty-nine thousand, nine hundred forty-four".