212113245 has 32 divisors (see below), whose sum is σ = 372787200. Its totient is φ = 102510144.

The previous prime is 212113243. The next prime is 212113247. The reversal of 212113245 is 542311212.

It is an interprime number because it is at equal distance from previous prime (212113243) and next prime (212113247).

It is not a de Polignac number, because 212113245 - 2¹ = 212113243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212113243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9625 + ... + 22734.

It is an arithmetic number, because the mean of its divisors is an integer number (11649600).

Almost surely, 2^212113245 is an apocalyptic number.

It is an amenable number.

212113245 is a deficient number, since it is larger than the sum of its proper divisors (160673955).

212113245 is a wasteful number, since it uses less digits than its factorization.

212113245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32409.

The product of its digits is 480, while the sum is 21.

The square root of 212113245 is about 14564.1081086347. The cubic root of 212113245 is about 596.3793481930.

Adding to 212113245 its reverse (542311212), we get a palindrome (754424457).

The spelling of 212113245 in words is "two hundred twelve million, one hundred thirteen thousand, two hundred forty-five".