212859425 has 6 divisors (see below), whose sum is σ = 263945718. Its totient is φ = 170287520.

The previous prime is 212859407. The next prime is 212859443. The reversal of 212859425 is 524958212.

It is an interprime number because it is at equal distance from previous prime (212859407) and next prime (212859443).

It can be written as a sum of positive squares in 3 ways, for example, as 22391824 + 190467601 = 4732^2 + 13801^2 .

It is not a de Polignac number, because 212859425 - 2¹² = 212855329 is a prime.

It is a super-2 number, since 2×212859425² = 90618269622661250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4257164 + ... + 4257213.

It is an arithmetic number, because the mean of its divisors is an integer number (43990953).

Almost surely, 2^212859425 is an apocalyptic number.

212859425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212859425 is a deficient number, since it is larger than the sum of its proper divisors (51086293).

212859425 is an equidigital number, since it uses as much as digits as its factorization.

212859425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8514387 (or 8514382 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 212859425 is about 14589.7027043048. The cubic root of 212859425 is about 597.0778517045.

The spelling of 212859425 in words is "two hundred twelve million, eight hundred fifty-nine thousand, four hundred twenty-five".