212065491 has 8 divisors (see below), whose sum is σ = 308458944. Its totient is φ = 128524520.

The previous prime is 212065471. The next prime is 212065493. The reversal of 212065491 is 194560212.

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

It is a cyclic number.

It is not a de Polignac number, because 212065491 - 2⁵ = 212065459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212065493) 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, 3213081 + ... + 3213146.

It is an arithmetic number, because the mean of its divisors is an integer number (38557368).

Almost surely, 2^212065491 is an apocalyptic number.

212065491 is a deficient number, since it is larger than the sum of its proper divisors (96393453).

212065491 is a wasteful number, since it uses less digits than its factorization.

212065491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6426241.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 212065491 is about 14562.4685750734. The cubic root of 212065491 is about 596.3345896539.

The spelling of 212065491 in words is "two hundred twelve million, sixty-five thousand, four hundred ninety-one".