2181303465 has 16 divisors (see below), whose sum is σ = 3807366336. Its totient is φ = 1057601600.

The previous prime is 2181303433. The next prime is 2181303497. The reversal of 2181303465 is 5643031812.

It is an interprime number because it is at equal distance from previous prime (2181303433) and next prime (2181303497).

It is not a de Polignac number, because 2181303465 - 2⁵ = 2181303433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6609846 + ... + 6610175.

It is an arithmetic number, because the mean of its divisors is an integer number (237960396).

Almost surely, 2^2181303465 is an apocalyptic number.

It is an amenable number.

2181303465 is a deficient number, since it is larger than the sum of its proper divisors (1626062871).

2181303465 is a wasteful number, since it uses less digits than its factorization.

2181303465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13220040.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2181303465 is about 46704.4266103332. The cubic root of 2181303465 is about 1296.8966340147.

The spelling of 2181303465 in words is "two billion, one hundred eighty-one million, three hundred three thousand, four hundred sixty-five".