2251555500443 has 4 divisors (see below), whose sum is σ = 2251564011768. Its totient is φ = 2251546989120.

The previous prime is 2251555500437. The next prime is 2251555500473. The reversal of 2251555500443 is 3440055551522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2251555500443 - 2⁶ = 2251555500379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2251555500443.

It is not an unprimeable number, because it can be changed into a prime (2251555500473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3845693 + ... + 4392318.

It is an arithmetic number, because the mean of its divisors is an integer number (562891002942).

Almost surely, 2^{2251555500443} is an apocalyptic number.

2251555500443 is a deficient number, since it is larger than the sum of its proper divisors (8511325).

2251555500443 is an equidigital number, since it uses as much as digits as its factorization.

2251555500443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8511324.

The product of its (nonzero) digits is 600000, while the sum is 41.

The spelling of 2251555500443 in words is "two trillion, two hundred fifty-one billion, five hundred fifty-five million, five hundred thousand, four hundred forty-three".