2171626631 has 6 divisors (see below), whose sum is σ = 2306883960. Its totient is φ = 2043883616.

The previous prime is 2171626621. The next prime is 2171626637. The reversal of 2171626631 is 1366261712.

It is not a de Polignac number, because 2171626631 - 2²² = 2167432327 is a prime.

It is a super-2 number, since 2×2171626631² = 9431924448936820322, 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 = 2171626591 and 2171626600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171626637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3756851 + ... + 3757428.

It is an arithmetic number, because the mean of its divisors is an integer number (384480660).

Almost surely, 2^2171626631 is an apocalyptic number.

2171626631 is a deficient number, since it is larger than the sum of its proper divisors (135257329).

2171626631 is an equidigital number, since it uses as much as digits as its factorization.

2171626631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7514313 (or 7514296 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 2171626631 is about 46600.7149194087. The cubic root of 2171626631 is about 1294.9759999130.

The spelling of 2171626631 in words is "two billion, one hundred seventy-one million, six hundred twenty-six thousand, six hundred thirty-one".