2171056531 has 8 divisors (see below), whose sum is σ = 2516154624. Its totient is φ = 1834695240.

The previous prime is 2171056499. The next prime is 2171056561. The reversal of 2171056531 is 1356501712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2171056531 - 2⁵ = 2171056499 is a prime.

It is a super-2 number, since 2×2171056531² = 9426972921595507922, 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 = 2171056493 and 2171056502.

It is not an unprimeable number, because it can be changed into a prime (2171056561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2183665 + ... + 2184658.

It is an arithmetic number, because the mean of its divisors is an integer number (314519328).

Almost surely, 2^2171056531 is an apocalyptic number.

2171056531 is a deficient number, since it is larger than the sum of its proper divisors (345098093).

2171056531 is an equidigital number, since it uses as much as digits as its factorization.

2171056531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368401.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 2171056531 is about 46594.5976589561. The cubic root of 2171056531 is about 1294.8626700523.

The spelling of 2171056531 in words is "two billion, one hundred seventy-one million, fifty-six thousand, five hundred thirty-one".