2251163506551 has 8 divisors (see below), whose sum is σ = 3006562281600. Its totient is φ = 1498270201272.

The previous prime is 2251163506457. The next prime is 2251163506649. The reversal of 2251163506551 is 1556053611522.

It is a happy number.

2251163506551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-2251163506551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251163506651) 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, 626365345 + ... + 626368938.

It is an arithmetic number, because the mean of its divisors is an integer number (375820285200).

Almost surely, 2^{2251163506551} is an apocalyptic number.

2251163506551 is a deficient number, since it is larger than the sum of its proper divisors (755398775049).

2251163506551 is a wasteful number, since it uses less digits than its factorization.

2251163506551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252734885.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 2251163506551 in words is "two trillion, two hundred fifty-one billion, one hundred sixty-three million, five hundred six thousand, five hundred fifty-one".