213134434 has 4 divisors (see below), whose sum is σ = 319701654. Its totient is φ = 106567216.

The previous prime is 213134431. The next prime is 213134447. The reversal of 213134434 is 434431312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 213014025 + 120409 = 14595^2 + 347^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213134399 and 213134408.

It is not an unprimeable number, because it can be changed into a prime (213134431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53283607 + ... + 53283610.

Almost surely, 2^213134434 is an apocalyptic number.

213134434 is a deficient number, since it is larger than the sum of its proper divisors (106567220).

213134434 is a wasteful number, since it uses less digits than its factorization.

213134434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106567219.

The product of its digits is 3456, while the sum is 25.

The square root of 213134434 is about 14599.1244258003. The cubic root of 213134434 is about 597.3348775465.

Adding to 213134434 its reverse (434431312), we get a palindrome (647565746).

The spelling of 213134434 in words is "two hundred thirteen million, one hundred thirty-four thousand, four hundred thirty-four".