213494436 has 18 divisors (see below), whose sum is σ = 539666582. Its totient is φ = 71164800.

The previous prime is 213494417. The next prime is 213494443. The reversal of 213494436 is 634494312.

It is a happy number.

213494436 is a `hidden beast` number, since 2 + 134 + 94 + 436 = 666.

213494436 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., 177422400 + 36072036 = 13320^2 + 6006^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5930401 = 213494436 / (2 + 1 + 3 + 4 + 9 + 4 + 4 + 3 + 6).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 213494436.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2965165 + ... + 2965236.

Almost surely, 2^213494436 is an apocalyptic number.

It is an amenable number.

213494436 is an abundant number, since it is smaller than the sum of its proper divisors (326172146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213494436 is a wasteful number, since it uses less digits than its factorization.

213494436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5930411 (or 5930406 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 213494436 is about 14611.4487988016. The cubic root of 213494436 is about 597.6710046651.

The spelling of 213494436 in words is "two hundred thirteen million, four hundred ninety-four thousand, four hundred thirty-six".