213473434 has 4 divisors (see below), whose sum is σ = 320210154. Its totient is φ = 106736716.

The previous prime is 213473423. The next prime is 213473443. The reversal of 213473434 is 434374312.

It is a happy number.

213473434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 207446409 + 6027025 = 14403^2 + 2455^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213473396 and 213473405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53368357 + ... + 53368360.

Almost surely, 2^213473434 is an apocalyptic number.

213473434 is a deficient number, since it is larger than the sum of its proper divisors (106736720).

213473434 is a wasteful number, since it uses less digits than its factorization.

213473434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106736719.

The product of its digits is 24192, while the sum is 31.

The square root of 213473434 is about 14610.7300981162. The cubic root of 213473434 is about 597.6514058748.

The spelling of 213473434 in words is "two hundred thirteen million, four hundred seventy-three thousand, four hundred thirty-four".