213579905 has 16 divisors (see below), whose sum is σ = 319538304. Its totient is φ = 133140480.

The previous prime is 213579901. The next prime is 213579913. The reversal of 213579905 is 509975312.

213579905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213579905 - 2² = 213579901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213579901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276992 + ... + 277761.

It is an arithmetic number, because the mean of its divisors is an integer number (19971144).

Almost surely, 2^213579905 is an apocalyptic number.

It is an amenable number.

213579905 is a deficient number, since it is larger than the sum of its proper divisors (105958399).

213579905 is a wasteful number, since it uses less digits than its factorization.

213579905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554776.

The product of its (nonzero) digits is 85050, while the sum is 41.

The square root of 213579905 is about 14614.3732332249. The cubic root of 213579905 is about 597.7507499564.

The spelling of 213579905 in words is "two hundred thirteen million, five hundred seventy-nine thousand, nine hundred five".