212009253 has 4 divisors (see below), whose sum is σ = 282679008. Its totient is φ = 141339500.

The previous prime is 212009249. The next prime is 212009257. The reversal of 212009253 is 352900212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (212009249) and next prime (212009257).

It is a cyclic number.

It is not a de Polignac number, because 212009253 - 2² = 212009249 is a prime.

It is a super-4 number, since 4×212009253⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212009257) 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, 35334873 + ... + 35334878.

It is an arithmetic number, because the mean of its divisors is an integer number (70669752).

Almost surely, 2^212009253 is an apocalyptic number.

It is an amenable number.

212009253 is a deficient number, since it is larger than the sum of its proper divisors (70669755).

212009253 is an equidigital number, since it uses as much as digits as its factorization.

212009253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70669754.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 212009253 is about 14560.5375244185. The cubic root of 212009253 is about 596.2818706731.

Adding to 212009253 its reverse (352900212), we get a palindrome (564909465).

The spelling of 212009253 in words is "two hundred twelve million, nine thousand, two hundred fifty-three".