213217492 has 6 divisors (see below), whose sum is σ = 373130618. Its totient is φ = 106608744.

The previous prime is 213217489. The next prime is 213217493. The reversal of 213217492 is 294712312.

213217492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 184851216 + 28366276 = 13596^2 + 5326^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213217493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26652183 + ... + 26652190.

Almost surely, 2^213217492 is an apocalyptic number.

It is an amenable number.

213217492 is a deficient number, since it is larger than the sum of its proper divisors (159913126).

213217492 is a wasteful number, since it uses less digits than its factorization.

213217492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53304377 (or 53304375 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 213217492 is about 14601.9687713678. The cubic root of 213217492 is about 597.4124608132.

The spelling of 213217492 in words is "two hundred thirteen million, two hundred seventeen thousand, four hundred ninety-two".