215404472 has 8 divisors (see below), whose sum is σ = 403883400. Its totient is φ = 107702232.

The previous prime is 215404403. The next prime is 215404477. The reversal of 215404472 is 274404512.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215404477) by changing a digit.

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, 13462772 + ... + 13462787.

It is an arithmetic number, because the mean of its divisors is an integer number (50485425).

Almost surely, 2^215404472 is an apocalyptic number.

It is an amenable number.

215404472 is a deficient number, since it is larger than the sum of its proper divisors (188478928).

215404472 is a wasteful number, since it uses less digits than its factorization.

215404472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26925565 (or 26925561 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 215404472 is about 14676.6641986522. The cubic root of 215404472 is about 599.4480776437.

Adding to 215404472 its reverse (274404512), we get a palindrome (489808984).

The spelling of 215404472 in words is "two hundred fifteen million, four hundred four thousand, four hundred seventy-two".