212775025 has 6 divisors (see below), whose sum is σ = 263841062. Its totient is φ = 170220000.

The previous prime is 212775023. The next prime is 212775067. The reversal of 212775025 is 520577212.

212775025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 7683984 + 205091041 = 2772^2 + 14321^2 .

It is not a de Polignac number, because 212775025 - 2¹ = 212775023 is a prime.

It is a super-2 number, since 2×212775025² = 90546422527501250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212775023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4255476 + ... + 4255525.

Almost surely, 2^212775025 is an apocalyptic number.

212775025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212775025 is a deficient number, since it is larger than the sum of its proper divisors (51066037).

212775025 is an equidigital number, since it uses as much as digits as its factorization.

212775025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8511011 (or 8511006 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 212775025 is about 14586.8099665417. The cubic root of 212775025 is about 596.9989263252.

The spelling of 212775025 in words is "two hundred twelve million, seven hundred seventy-five thousand, twenty-five".