212731629 has 8 divisors (see below), whose sum is σ = 309427872. Its totient is φ = 128928240.

The previous prime is 212731529. The next prime is 212731637. The reversal of 212731629 is 926137212.

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

It is not a de Polignac number, because 212731629 - 2⁸ = 212731373 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 6446413 = 212731629 / (2 + 1 + 2 + 7 + 3 + 1 + 6 + 2 + 9).

It is a self number, because there is not a number n which added to its sum of digits gives 212731629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212731529) 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, 3223174 + ... + 3223239.

It is an arithmetic number, because the mean of its divisors is an integer number (38678484).

Almost surely, 2^212731629 is an apocalyptic number.

It is an amenable number.

212731629 is a deficient number, since it is larger than the sum of its proper divisors (96696243).

212731629 is a wasteful number, since it uses less digits than its factorization.

212731629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6446427.

The product of its digits is 9072, while the sum is 33.

The square root of 212731629 is about 14585.3223824501. The cubic root of 212731629 is about 596.9583370896.

The spelling of 212731629 in words is "two hundred twelve million, seven hundred thirty-one thousand, six hundred twenty-nine".