213705704 has 8 divisors (see below), whose sum is σ = 400698210. Its totient is φ = 106852848.

The previous prime is 213705683. The next prime is 213705707. The reversal of 213705704 is 407507312.

It can be written as a sum of positive squares in only one way, i.e., 116683204 + 97022500 = 10802^2 + 9850^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (213705707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13356599 + ... + 13356614.

Almost surely, 2^213705704 is an apocalyptic number.

It is an amenable number.

213705704 is a deficient number, since it is larger than the sum of its proper divisors (186992506).

213705704 is a wasteful number, since it uses less digits than its factorization.

213705704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26713219 (or 26713215 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 213705704 is about 14618.6765474854. The cubic root of 213705704 is about 597.8680857263.

The spelling of 213705704 in words is "two hundred thirteen million, seven hundred five thousand, seven hundred four".