213972705 has 16 divisors (see below), whose sum is σ = 380396160. Its totient is φ = 114118704.

The previous prime is 213972673. The next prime is 213972719. The reversal of 213972705 is 507279312.

213972705 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 213972705 - 2⁵ = 213972673 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213972705.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792357 + ... + 792626.

It is an arithmetic number, because the mean of its divisors is an integer number (23774760).

Almost surely, 2^213972705 is an apocalyptic number.

It is an amenable number.

213972705 is a deficient number, since it is larger than the sum of its proper divisors (166423455).

213972705 is a wasteful number, since it uses less digits than its factorization.

213972705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584997 (or 1584991 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 213972705 is about 14627.8058846841. The cubic root of 213972705 is about 598.1169715218.

The spelling of 213972705 in words is "two hundred thirteen million, nine hundred seventy-two thousand, seven hundred five".