206632631 has 2 divisors, whose sum is σ = 206632632. Its totient is φ = 206632630.

The previous prime is 206632553. The next prime is 206632651. The reversal of 206632631 is 136236602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206632631 is a prime.

It is a super-2 number, since 2×206632631² = 85394088387964322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_11425664 and since 206632631 and 11425664 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 206632594 and 206632603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206632651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103316315 + 103316316.

It is an arithmetic number, because the mean of its divisors is an integer number (103316316).

Almost surely, 2^206632631 is an apocalyptic number.

206632631 is a deficient number, since it is larger than the sum of its proper divisors (1).

206632631 is an equidigital number, since it uses as much as digits as its factorization.

206632631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 206632631 is about 14374.7219451369. The cubic root of 206632631 is about 591.1980167561.

The spelling of 206632631 in words is "two hundred six million, six hundred thirty-two thousand, six hundred thirty-one".