212013045 has 20 divisors (see below), whose sum is σ = 380053740. Its totient is φ = 113073408.

The previous prime is 212013017. The next prime is 212013059. The reversal of 212013045 is 540310212.

It can be written as a sum of positive squares in 2 ways, for example, as 119968209 + 92044836 = 10953^2 + 9594^2 .

It is not a de Polignac number, because 212013045 - 2⁶ = 212012981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 261340 + ... + 262149.

It is an arithmetic number, because the mean of its divisors is an integer number (19002687).

Almost surely, 2^212013045 is an apocalyptic number.

It is an amenable number.

212013045 is a deficient number, since it is larger than the sum of its proper divisors (168040695).

212013045 is an equidigital number, since it uses as much as digits as its factorization.

212013045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523506 (or 523497 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 212013045 is about 14560.6677388092. The cubic root of 212013045 is about 596.2854256868.

Adding to 212013045 its reverse (540310212), we get a palindrome (752323257).

The spelling of 212013045 in words is "two hundred twelve million, thirteen thousand, forty-five".