212131139 has 8 divisors (see below), whose sum is σ = 241477632. Its totient is φ = 184461640.

The previous prime is 212131133. The next prime is 212131187. The reversal of 212131139 is 931131212.

212131139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 212131139 - 2⁴ = 212131123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (212131133) 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, 418979 + ... + 419484.

It is an arithmetic number, because the mean of its divisors is an integer number (30184704).

Almost surely, 2^212131139 is an apocalyptic number.

212131139 is a deficient number, since it is larger than the sum of its proper divisors (29346493).

212131139 is a wasteful number, since it uses less digits than its factorization.

212131139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838497.

The product of its digits is 324, while the sum is 23.

The square root of 212131139 is about 14564.7224141073. The cubic root of 212131139 is about 596.3961180274.

The spelling of 212131139 in words is "two hundred twelve million, one hundred thirty-one thousand, one hundred thirty-nine".