212404293 has 6 divisors (see below), whose sum is σ = 306806214. Its totient is φ = 141602856.

The previous prime is 212404261. The next prime is 212404303. The reversal of 212404293 is 392404212.

It can be written as a sum of positive squares in only one way, i.e., 149010849 + 63393444 = 12207^2 + 7962^2 .

It is not a de Polignac number, because 212404293 - 2⁵ = 212404261 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212404223) 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, 11800230 + ... + 11800247.

It is an arithmetic number, because the mean of its divisors is an integer number (51134369).

Almost surely, 2^212404293 is an apocalyptic number.

It is an amenable number.

212404293 is a deficient number, since it is larger than the sum of its proper divisors (94401921).

212404293 is a wasteful number, since it uses less digits than its factorization.

212404293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23600483 (or 23600480 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 212404293 is about 14574.0966443893. The cubic root of 212404293 is about 596.6519945138.

The spelling of 212404293 in words is "two hundred twelve million, four hundred four thousand, two hundred ninety-three".