2172270377 has 4 divisors (see below), whose sum is σ = 2172708036. Its totient is φ = 2171832720.

The previous prime is 2172270367. The next prime is 2172270467. The reversal of 2172270377 is 7730722712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1983455296 + 188815081 = 44536^2 + 13741^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172270377 - 2¹⁸ = 2172008233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2172270377.

It is not an unprimeable number, because it can be changed into a prime (2172270307) 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, 211298 + ... + 221339.

It is an arithmetic number, because the mean of its divisors is an integer number (543177009).

Almost surely, 2^2172270377 is an apocalyptic number.

It is an amenable number.

2172270377 is a deficient number, since it is larger than the sum of its proper divisors (437659).

2172270377 is an equidigital number, since it uses as much as digits as its factorization.

2172270377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437658.

The product of its (nonzero) digits is 57624, while the sum is 38.

The square root of 2172270377 is about 46607.6214475701. The cubic root of 2172270377 is about 1295.1039459802.

The spelling of 2172270377 in words is "two billion, one hundred seventy-two million, two hundred seventy thousand, three hundred seventy-seven".