212913825 has 12 divisors (see below), whose sum is σ = 352017648. Its totient is φ = 113554000.

The previous prime is 212913821. The next prime is 212913839. The reversal of 212913825 is 528319212.

It is a happy number.

It is not a de Polignac number, because 212913825 - 2² = 212913821 is a prime.

It is a super-2 number, since 2×212913825² = 90664593752261250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212913821) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1419351 + ... + 1419500.

It is an arithmetic number, because the mean of its divisors is an integer number (29334804).

Almost surely, 2^212913825 is an apocalyptic number.

212913825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212913825 is a deficient number, since it is larger than the sum of its proper divisors (139103823).

212913825 is a wasteful number, since it uses less digits than its factorization.

212913825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838864 (or 2838859 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 212913825 is about 14591.5669138033. The cubic root of 212913825 is about 597.1287119824.

The spelling of 212913825 in words is "two hundred twelve million, nine hundred thirteen thousand, eight hundred twenty-five".