2172132461 has 2 divisors, whose sum is σ = 2172132462. Its totient is φ = 2172132460.

The previous prime is 2172132409. The next prime is 2172132463. The reversal of 2172132461 is 1642312712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2172119236 + 13225 = 46606^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172132461 - 2¹⁴ = 2172116077 is a prime.

Together with 2172132463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172132463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086066230 + 1086066231.

It is an arithmetic number, because the mean of its divisors is an integer number (1086066231).

Almost surely, 2^2172132461 is an apocalyptic number.

It is an amenable number.

2172132461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172132461 is an equidigital number, since it uses as much as digits as its factorization.

2172132461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 2172132461 is about 46606.1418806577. The cubic root of 2172132461 is about 1295.0765369710.

The spelling of 2172132461 in words is "two billion, one hundred seventy-two million, one hundred thirty-two thousand, four hundred sixty-one".