215130433 has 6 divisors (see below), whose sum is σ = 250253826. Its totient is φ = 184397472.

The previous prime is 215130413. The next prime is 215130437. The reversal of 215130433 is 334031512.

It can be written as a sum of positive squares in only one way, i.e., 208744704 + 6385729 = 14448^2 + 2527^2 .

It is not a de Polignac number, because 215130433 - 2⁵ = 215130401 is a prime.

It is a super-2 number, since 2×215130433² = 92562206405534978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215130437) 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 in 5 ways as a sum of consecutive naturals, for example, 2195160 + ... + 2195257.

It is an arithmetic number, because the mean of its divisors is an integer number (41708971).

Almost surely, 2^215130433 is an apocalyptic number.

It is an amenable number.

215130433 is a deficient number, since it is larger than the sum of its proper divisors (35123393).

215130433 is an equidigital number, since it uses as much as digits as its factorization.

215130433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4390431 (or 4390424 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 215130433 is about 14667.3253526333. The cubic root of 215130433 is about 599.1937624908.

Adding to 215130433 its reverse (334031512), we get a palindrome (549161945).

The spelling of 215130433 in words is "two hundred fifteen million, one hundred thirty thousand, four hundred thirty-three".