2145504399 has 8 divisors (see below), whose sum is σ = 2892815280. Its totient is φ = 1414264896.

The previous prime is 2145504367. The next prime is 2145504409. The reversal of 2145504399 is 9934055412.

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

It is not a de Polignac number, because 2145504399 - 2⁵ = 2145504367 is a prime.

It is a super-2 number, since 2×2145504399² = 9206378252256702402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2145504399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145504359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4017532 + ... + 4018065.

It is an arithmetic number, because the mean of its divisors is an integer number (361601910).

Almost surely, 2^2145504399 is an apocalyptic number.

2145504399 is a deficient number, since it is larger than the sum of its proper divisors (747310881).

2145504399 is an equidigital number, since it uses as much as digits as its factorization.

2145504399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8035689.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 2145504399 is about 46319.5897974065. The cubic root of 2145504399 is about 1289.7626707199.

The spelling of 2145504399 in words is "two billion, one hundred forty-five million, five hundred four thousand, three hundred ninety-nine".