212287090 has 8 divisors (see below), whose sum is σ = 382116780. Its totient is φ = 84914832.

The previous prime is 212287081. The next prime is 212287121. The reversal of 212287090 is 90782212.

It can be written as a sum of positive squares in 2 ways, for example, as 212255761 + 31329 = 14569^2 + 177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10614345 + ... + 10614364.

Almost surely, 2^212287090 is an apocalyptic number.

212287090 is a deficient number, since it is larger than the sum of its proper divisors (169829690).

212287090 is a wasteful number, since it uses less digits than its factorization.

212287090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21228716.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 212287090 is about 14570.0751542331. The cubic root of 212287090 is about 596.5422317138.

The spelling of 212287090 in words is "two hundred twelve million, two hundred eighty-seven thousand, ninety".