213432448 has 16 divisors (see below), whose sum is σ = 425197710. Its totient is φ = 106716160.

The previous prime is 213432421. The next prime is 213432449. The reversal of 213432448 is 844234312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 155550784 + 57881664 = 12472^2 + 7608^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (213432449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833593 + ... + 833848.

Almost surely, 2^213432448 is an apocalyptic number.

It is an amenable number.

213432448 is a deficient number, since it is larger than the sum of its proper divisors (211765262).

213432448 is an equidigital number, since it uses as much as digits as its factorization.

213432448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667455 (or 1667443 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 213432448 is about 14609.3274314734. The cubic root of 213432448 is about 597.6131545759.

The spelling of 213432448 in words is "two hundred thirteen million, four hundred thirty-two thousand, four hundred forty-eight".