106591631 has 4 divisors (see below), whose sum is σ = 106654872. Its totient is φ = 106528392.

The previous prime is 106591627. The next prime is 106591673. The reversal of 106591631 is 136195601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136195601 = 1381 ⋅98621.

It is a cyclic number.

It is not a de Polignac number, because 106591631 - 2² = 106591627 is a prime.

It is a super-2 number, since 2×106591631² = 22723551598480322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106591601) 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, 29021 + ... + 32486.

It is an arithmetic number, because the mean of its divisors is an integer number (26663718).

Almost surely, 2^106591631 is an apocalyptic number.

106591631 is a deficient number, since it is larger than the sum of its proper divisors (63241).

106591631 is an equidigital number, since it uses as much as digits as its factorization.

106591631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63240.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 106591631 is about 10324.3223022143. The cubic root of 106591631 is about 474.1412087371.

The spelling of 106591631 in words is "one hundred six million, five hundred ninety-one thousand, six hundred thirty-one".