106213631 has 4 divisors (see below), whose sum is σ = 109876200. Its totient is φ = 102551064.

The previous prime is 106213543. The next prime is 106213649. The reversal of 106213631 is 136312601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 106213631 - 2¹⁸ = 105951487 is a prime.

It is a super-2 number, since 2×106213631² = 22562670820408322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 106213597 and 106213606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106213651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1831241 + ... + 1831298.

It is an arithmetic number, because the mean of its divisors is an integer number (27469050).

Almost surely, 2^106213631 is an apocalyptic number.

106213631 is a deficient number, since it is larger than the sum of its proper divisors (3662569).

106213631 is an equidigital number, since it uses as much as digits as its factorization.

106213631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3662568.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 106213631 is about 10305.9997574229. Note that the first 3 decimals coincide. The cubic root of 106213631 is about 473.5800713300.

The spelling of 106213631 in words is "one hundred six million, two hundred thirteen thousand, six hundred thirty-one".