212040025 has 12 divisors (see below), whose sum is σ = 271997100. Its totient is φ = 163782080.

The previous prime is 212040001. The next prime is 212040043. The reversal of 212040025 is 520040212.

It can be written as a sum of positive squares in 6 ways, for example, as 5456896 + 206583129 = 2336^2 + 14373^2 .

It is not a de Polignac number, because 212040025 - 2⁷ = 212039897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212039990 and 212040008.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145510 + ... + 146959.

It is an arithmetic number, because the mean of its divisors is an integer number (22666425).

Almost surely, 2^212040025 is an apocalyptic number.

212040025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212040025 is a deficient number, since it is larger than the sum of its proper divisors (59957075).

212040025 is a wasteful number, since it uses less digits than its factorization.

212040025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292508 (or 292503 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 212040025 is about 14561.5941778364. The cubic root of 212040025 is about 596.3107183104.

Adding to 212040025 its reverse (520040212), we get a palindrome (732080237).

The spelling of 212040025 in words is "two hundred twelve million, forty thousand, twenty-five".