212866004 has 24 divisors (see below), whose sum is σ = 402915240. Its totient is φ = 97818624.

The previous prime is 212866001. The next prime is 212866007. The reversal of 212866004 is 400668212.

It is an interprime number because it is at equal distance from previous prime (212866001) and next prime (212866007).

It can be written as a sum of positive squares in 4 ways, for example, as 16810000 + 196056004 = 4100^2 + 14002^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212866001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3332 + ... + 20900.

It is an arithmetic number, because the mean of its divisors is an integer number (16788135).

Almost surely, 2^212866004 is an apocalyptic number.

It is an amenable number.

212866004 is a deficient number, since it is larger than the sum of its proper divisors (190049236).

212866004 is a wasteful number, since it uses less digits than its factorization.

212866004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17819 (or 17817 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 212866004 is about 14589.9281698026. The cubic root of 212866004 is about 597.0840030800.

The spelling of 212866004 in words is "two hundred twelve million, eight hundred sixty-six thousand, four".