2173631 has 4 divisors (see below), whose sum is σ = 2177664. Its totient is φ = 2169600.

The previous prime is 2173601. The next prime is 2173643. The reversal of 2173631 is 1363712.

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 2173631 - 2¹⁴ = 2157247 is a prime.

It is a super-2 number, since 2×2173631² = 9449343448322, 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 = 2173597 and 2173606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173601) 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, 1055 + ... + 2336.

It is an arithmetic number, because the mean of its divisors is an integer number (544416).

2^2173631 is an apocalyptic number.

2173631 is a deficient number, since it is larger than the sum of its proper divisors (4033).

2173631 is an equidigital number, since it uses as much as digits as its factorization.

2173631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032.

The product of its digits is 756, while the sum is 23.

The square root of 2173631 is about 1474.3239128495. The cubic root of 2173631 is about 129.5374289925.

The spelling of 2173631 in words is "two million, one hundred seventy-three thousand, six hundred thirty-one".