212542245 has 64 divisors (see below), whose sum is σ = 411056640. Its totient is φ = 103762944.

The previous prime is 212542217. The next prime is 212542277. The reversal of 212542245 is 542245212.

It is not a de Polignac number, because 212542245 - 2⁶ = 212542181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83664 + ... + 86166.

It is an arithmetic number, because the mean of its divisors is an integer number (6422760).

Almost surely, 2^212542245 is an apocalyptic number.

It is an amenable number.

212542245 is a deficient number, since it is larger than the sum of its proper divisors (198514395).

212542245 is a wasteful number, since it uses less digits than its factorization.

212542245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571 (or 2565 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 212542245 is about 14578.8286566514. The cubic root of 212542245 is about 596.7811374199.

Adding to 212542245 its reverse (542245212), we get a palindrome (754787457).

The spelling of 212542245 in words is "two hundred twelve million, five hundred forty-two thousand, two hundred forty-five".