2513899217 has 4 divisors (see below), whose sum is σ = 2514404916. Its totient is φ = 2513393520.

The previous prime is 2513899187. The next prime is 2513899231. The reversal of 2513899217 is 7129983152.

It is a happy number.

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 1935208081 + 578691136 = 43991^2 + 24056^2 .

It is a cyclic number.

It is not a de Polignac number, because 2513899217 - 2¹⁰ = 2513898193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2513899117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245318 + ... + 255359.

It is an arithmetic number, because the mean of its divisors is an integer number (628601229).

Almost surely, 2^2513899217 is an apocalyptic number.

It is an amenable number.

2513899217 is a deficient number, since it is larger than the sum of its proper divisors (505699).

2513899217 is an equidigital number, since it uses as much as digits as its factorization.

2513899217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505698.

The product of its digits is 272160, while the sum is 47.

The square root of 2513899217 is about 50138.7995169410. The cubic root of 2513899217 is about 1359.7193799978.

The spelling of 2513899217 in words is "two billion, five hundred thirteen million, eight hundred ninety-nine thousand, two hundred seventeen".