212534391 has 8 divisors (see below), whose sum is σ = 300048624. Its totient is φ = 133354880.

The previous prime is 212534389. The next prime is 212534393. The reversal of 212534391 is 193435212.

212534391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212534389) and next prime (212534393).

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 212534391 - 2¹ = 212534389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212534393) 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, 2083620 + ... + 2083721.

It is an arithmetic number, because the mean of its divisors is an integer number (37506078).

Almost surely, 2^212534391 is an apocalyptic number.

212534391 is a deficient number, since it is larger than the sum of its proper divisors (87514233).

212534391 is a wasteful number, since it uses less digits than its factorization.

212534391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167361.

The product of its digits is 6480, while the sum is 30.

The square root of 212534391 is about 14578.5592909588. The cubic root of 212534391 is about 596.7737864471.

The spelling of 212534391 in words is "two hundred twelve million, five hundred thirty-four thousand, three hundred ninety-one".