2172400465 has 8 divisors (see below), whose sum is σ = 2607403968. Its totient is φ = 1737571440.

The previous prime is 2172400459. The next prime is 2172400519. The reversal of 2172400465 is 5640042712.

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

It is not a de Polignac number, because 2172400465 - 2⁷ = 2172400337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14451 + ... + 67480.

It is an arithmetic number, because the mean of its divisors is an integer number (325925496).

Almost surely, 2^2172400465 is an apocalyptic number.

It is an amenable number.

2172400465 is a deficient number, since it is larger than the sum of its proper divisors (435003503).

2172400465 is an equidigital number, since it uses as much as digits as its factorization.

2172400465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87239.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 2172400465 is about 46609.0169924233. The cubic root of 2172400465 is about 1295.1297982131.

The spelling of 2172400465 in words is "two billion, one hundred seventy-two million, four hundred thousand, four hundred sixty-five".