212315239 has 4 divisors (see below), whose sum is σ = 214376656. Its totient is φ = 210253824.

The previous prime is 212315219. The next prime is 212315251. The reversal of 212315239 is 932513212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212315239 - 2⁷ = 212315111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212315219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030554 + ... + 1030759.

It is an arithmetic number, because the mean of its divisors is an integer number (53594164).

Almost surely, 2^212315239 is an apocalyptic number.

212315239 is a deficient number, since it is larger than the sum of its proper divisors (2061417).

212315239 is a wasteful number, since it uses less digits than its factorization.

212315239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061416.

The product of its digits is 3240, while the sum is 28.

The square root of 212315239 is about 14571.0411089942. The cubic root of 212315239 is about 596.5685974640.

The spelling of 212315239 in words is "two hundred twelve million, three hundred fifteen thousand, two hundred thirty-nine".