212831219 has 4 divisors (see below), whose sum is σ = 214137096. Its totient is φ = 211525344.

The previous prime is 212831207. The next prime is 212831221. The reversal of 212831219 is 912138212.

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 212831219 - 2⁸ = 212830963 is a prime.

It is a super-2 number, since 2×212831219² = 90594255562051922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212831191 and 212831200.

It is not an unprimeable number, because it can be changed into a prime (212831249) 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, 652694 + ... + 653019.

It is an arithmetic number, because the mean of its divisors is an integer number (53534274).

Almost surely, 2^212831219 is an apocalyptic number.

212831219 is a deficient number, since it is larger than the sum of its proper divisors (1305877).

212831219 is a wasteful number, since it uses less digits than its factorization.

212831219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305876.

The product of its digits is 1728, while the sum is 29.

The square root of 212831219 is about 14588.7360316101. The cubic root of 212831219 is about 597.0514776131.

The spelling of 212831219 in words is "two hundred twelve million, eight hundred thirty-one thousand, two hundred nineteen".