215223533 has 6 divisors (see below), whose sum is σ = 250362126. Its totient is φ = 184477272.

The previous prime is 215223523. The next prime is 215223577. The reversal of 215223533 is 335322512.

215223533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 209757289 + 5466244 = 14483^2 + 2338^2 .

It is not a de Polignac number, because 215223533 - 2⁸ = 215223277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215223523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2196110 + ... + 2196207.

It is an arithmetic number, because the mean of its divisors is an integer number (41727021).

Almost surely, 2^215223533 is an apocalyptic number.

It is an amenable number.

215223533 is a deficient number, since it is larger than the sum of its proper divisors (35138593).

215223533 is an equidigital number, since it uses as much as digits as its factorization.

215223533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4392331 (or 4392324 counting only the distinct ones).

The product of its digits is 5400, while the sum is 26.

The square root of 215223533 is about 14670.4987304454. The cubic root of 215223533 is about 599.2801858654.

The spelling of 215223533 in words is "two hundred fifteen million, two hundred twenty-three thousand, five hundred thirty-three".