212395139 has 8 divisors (see below), whose sum is σ = 233755632. Its totient is φ = 191376640.

The previous prime is 212395121. The next prime is 212395171. The reversal of 212395139 is 931593212.

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 212395139 - 2¹² = 212391043 is a prime.

It is a super-2 number, since 2×212395139² = 90223390141658642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212395099 and 212395108.

It is not an unprimeable number, because it can be changed into a prime (212395199) 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, 84194 + ... + 86679.

It is an arithmetic number, because the mean of its divisors is an integer number (29219454).

Almost surely, 2^212395139 is an apocalyptic number.

212395139 is a deficient number, since it is larger than the sum of its proper divisors (21360493).

212395139 is a wasteful number, since it uses less digits than its factorization.

212395139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170997.

The product of its digits is 14580, while the sum is 35.

The square root of 212395139 is about 14573.7825906660. The cubic root of 212395139 is about 596.6434230756.

The spelling of 212395139 in words is "two hundred twelve million, three hundred ninety-five thousand, one hundred thirty-nine".