212301533 has 4 divisors (see below), whose sum is σ = 215781948. Its totient is φ = 208821120.

The previous prime is 212301527. The next prime is 212301541. The reversal of 212301533 is 335103212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61183684 + 151117849 = 7822^2 + 12293^2 .

It is a cyclic number.

It is not a de Polignac number, because 212301533 - 2²⁶ = 145192669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212300533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1740116 + ... + 1740237.

It is an arithmetic number, because the mean of its divisors is an integer number (53945487).

Almost surely, 2^212301533 is an apocalyptic number.

It is an amenable number.

212301533 is a deficient number, since it is larger than the sum of its proper divisors (3480415).

212301533 is an equidigital number, since it uses as much as digits as its factorization.

212301533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480414.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 212301533 is about 14570.5707849761. The cubic root of 212301533 is about 596.5557600354. Note that the first 3 decimals are identical.

Adding to 212301533 its reverse (335103212), we get a palindrome (547404745).

The spelling of 212301533 in words is "two hundred twelve million, three hundred one thousand, five hundred thirty-three".