2551721495 has 8 divisors (see below), whose sum is σ = 3067508016. Its totient is φ = 2037749056.

The previous prime is 2551721461. The next prime is 2551721519. The reversal of 2551721495 is 5941271552.

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

It is a cyclic number.

It is not a de Polignac number, because 2551721495 - 2⁸ = 2551721239 is a prime.

It is a super-2 number, since 2×2551721495² = 13022565176090070050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450422 + ... + 456051.

It is an arithmetic number, because the mean of its divisors is an integer number (383438502).

Almost surely, 2^2551721495 is an apocalyptic number.

2551721495 is a deficient number, since it is larger than the sum of its proper divisors (515786521).

2551721495 is an equidigital number, since it uses as much as digits as its factorization.

2551721495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907041.

The product of its digits is 126000, while the sum is 41.

The square root of 2551721495 is about 50514.5671564154. The cubic root of 2551721495 is about 1366.5045770156.

The spelling of 2551721495 in words is "two billion, five hundred fifty-one million, seven hundred twenty-one thousand, four hundred ninety-five".