212140347 has 8 divisors (see below), whose sum is σ = 291978240. Its totient is φ = 136864680.

The previous prime is 212140343. The next prime is 212140361. The reversal of 212140347 is 743041212.

It is a happy number.

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

It is not a de Polignac number, because 212140347 - 2² = 212140343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212140343) 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, 1140447 + ... + 1140632.

It is an arithmetic number, because the mean of its divisors is an integer number (36497280).

Almost surely, 2^212140347 is an apocalyptic number.

212140347 is a deficient number, since it is larger than the sum of its proper divisors (79837893).

212140347 is a wasteful number, since it uses less digits than its factorization.

212140347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281113.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 212140347 is about 14565.0385169419. The cubic root of 212140347 is about 596.4047471802.

Adding to 212140347 its reverse (743041212), we get a palindrome (955181559).

The spelling of 212140347 in words is "two hundred twelve million, one hundred forty thousand, three hundred forty-seven".