108213631 has 2 divisors, whose sum is σ = 108213632. Its totient is φ = 108213630.

The previous prime is 108213617. The next prime is 108213709. The reversal of 108213631 is 136312801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 108213631 - 2¹⁹ = 107689343 is a prime.

It is a super-2 number, since 2×108213631² = 23420379868408322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 108213596 and 108213605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108213601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54106815 + 54106816.

It is an arithmetic number, because the mean of its divisors is an integer number (54106816).

Almost surely, 2^108213631 is an apocalyptic number.

108213631 is a deficient number, since it is larger than the sum of its proper divisors (1).

108213631 is an equidigital number, since it uses as much as digits as its factorization.

108213631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 108213631 is about 10402.5780939150. The cubic root of 108213631 is about 476.5341069982.

The spelling of 108213631 in words is "one hundred eight million, two hundred thirteen thousand, six hundred thirty-one".