2172565430 has 32 divisors (see below), whose sum is σ = 4560494400. Its totient is φ = 744878400.

The previous prime is 2172565427. The next prime is 2172565433. The reversal of 2172565430 is 345652712.

It is an interprime number because it is at equal distance from previous prime (2172565427) and next prime (2172565433).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172565433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313271 + ... + 320130.

It is an arithmetic number, because the mean of its divisors is an integer number (142515450).

Almost surely, 2^2172565430 is an apocalyptic number.

2172565430 is an abundant number, since it is smaller than the sum of its proper divisors (2387928970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2172565430 is an equidigital number, since it uses as much as digits as its factorization.

2172565430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633429 (or 633415 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 2172565430 is about 46610.7866271317. The cubic root of 2172565430 is about 1295.1625800264.

The spelling of 2172565430 in words is "two billion, one hundred seventy-two million, five hundred sixty-five thousand, four hundred thirty".