212663631 has 8 divisors (see below), whose sum is σ = 286737840. Its totient is φ = 140182592.

The previous prime is 212663621. The next prime is 212663669. The reversal of 212663631 is 136366212.

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

It is a cyclic number.

It is not a de Polignac number, because 212663631 - 2⁶ = 212663567 is a prime.

It is a super-2 number, since 2×212663631² = 90451639900208322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212663611) 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, 397980 + ... + 398513.

It is an arithmetic number, because the mean of its divisors is an integer number (35842230).

Almost surely, 2^212663631 is an apocalyptic number.

212663631 is a deficient number, since it is larger than the sum of its proper divisors (74074209).

212663631 is an equidigital number, since it uses as much as digits as its factorization.

212663631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796585.

The product of its digits is 7776, while the sum is 30.

The square root of 212663631 is about 14582.9911540808. The cubic root of 212663631 is about 596.8947259583.

The spelling of 212663631 in words is "two hundred twelve million, six hundred sixty-three thousand, six hundred thirty-one".