218825434 has 4 divisors (see below), whose sum is σ = 328238154. Its totient is φ = 109412716.

The previous prime is 218825419. The next prime is 218825441. The reversal of 218825434 is 434528812.

It is a happy number.

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., 142874209 + 75951225 = 11953^2 + 8715^2 .

It is a junction number, because it is equal to n+sod(n) for n = 218825393 and 218825402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54706357 + ... + 54706360.

Almost surely, 2^218825434 is an apocalyptic number.

218825434 is a deficient number, since it is larger than the sum of its proper divisors (109412720).

218825434 is a wasteful number, since it uses less digits than its factorization.

218825434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109412719.

The product of its digits is 61440, while the sum is 37.

The square root of 218825434 is about 14792.7493725811. The cubic root of 218825434 is about 602.6048177685.

The spelling of 218825434 in words is "two hundred eighteen million, eight hundred twenty-five thousand, four hundred thirty-four".