212067631 has 2 divisors, whose sum is σ = 212067632. Its totient is φ = 212067630.

The previous prime is 212067623. The next prime is 212067649. The reversal of 212067631 is 136760212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212067631 - 2³ = 212067623 is a prime.

It is a super-2 number, since 2×212067631² = 89945360235904322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212067631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212067601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106033815 + 106033816.

It is an arithmetic number, because the mean of its divisors is an integer number (106033816).

Almost surely, 2^212067631 is an apocalyptic number.

212067631 is a deficient number, since it is larger than the sum of its proper divisors (1).

212067631 is an equidigital number, since it uses as much as digits as its factorization.

212067631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 212067631 is about 14562.5420514414. The cubic root of 212067631 is about 596.3365955621.

It can be divided in two parts, 2120 and 67631, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 212067631 in words is "two hundred twelve million, sixty-seven thousand, six hundred thirty-one".