215213434 has 4 divisors (see below), whose sum is σ = 322820154. Its totient is φ = 107606716.

The previous prime is 215213419. The next prime is 215213441. The reversal of 215213434 is 434312512.

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., 191739409 + 23474025 = 13847^2 + 4845^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215213399 and 215213408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53803357 + ... + 53803360.

Almost surely, 2^215213434 is an apocalyptic number.

215213434 is a deficient number, since it is larger than the sum of its proper divisors (107606720).

215213434 is a wasteful number, since it uses less digits than its factorization.

215213434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107606719.

The product of its digits is 2880, while the sum is 25.

The square root of 215213434 is about 14670.1545322468. The cubic root of 215213434 is about 599.2708123160.

Adding to 215213434 its reverse (434312512), we get a palindrome (649525946).

The spelling of 215213434 in words is "two hundred fifteen million, two hundred thirteen thousand, four hundred thirty-four".