212161253 has 4 divisors (see below), whose sum is σ = 212852640. Its totient is φ = 211469868.

The previous prime is 212161211. The next prime is 212161267. The reversal of 212161253 is 352161212.

212161253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 212161253 - 2⁶ = 212161189 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 (212161273) 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, 345233 + ... + 345846.

It is an arithmetic number, because the mean of its divisors is an integer number (53213160).

Almost surely, 2^212161253 is an apocalyptic number.

It is an amenable number.

212161253 is a deficient number, since it is larger than the sum of its proper divisors (691387).

212161253 is an equidigital number, since it uses as much as digits as its factorization.

212161253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691386.

The product of its digits is 720, while the sum is 23.

The square root of 212161253 is about 14565.7561767318. The cubic root of 212161253 is about 596.4243380285.

The spelling of 212161253 in words is "two hundred twelve million, one hundred sixty-one thousand, two hundred fifty-three".