212002631 has 8 divisors (see below), whose sum is σ = 226573200. Its totient is φ = 197665408.

The previous prime is 212002621. The next prime is 212002643. The reversal of 212002631 is 136200212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212002631 is a prime.

It is a super-2 number, since 2×212002631² = 89890231101844322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212002601) 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, 56456 + ... + 60093.

It is an arithmetic number, because the mean of its divisors is an integer number (28321650).

Almost surely, 2^212002631 is an apocalyptic number.

212002631 is a deficient number, since it is larger than the sum of its proper divisors (14570569).

212002631 is a wasteful number, since it uses less digits than its factorization.

212002631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116673.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 212002631 is about 14560.3101271917. The cubic root of 212002631 is about 596.2756624226.

Adding to 212002631 its reverse (136200212), we get a palindrome (348202843).

The spelling of 212002631 in words is "two hundred twelve million, two thousand, six hundred thirty-one".