2155425503305 has 4 divisors (see below), whose sum is σ = 2586510603972. Its totient is φ = 1724340402640.

The previous prime is 2155425503263. The next prime is 2155425503369. The reversal of 2155425503305 is 5033055245512.

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 546132824064 + 1609292679241 = 739008^2 + 1268579^2 .

It is not a de Polignac number, because 2155425503305 - 2⁹ = 2155425502793 is a prime.

It is a super-2 number, since 2×2155425503305² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215542550326 + ... + 215542550335.

It is an arithmetic number, because the mean of its divisors is an integer number (646627650993).

Almost surely, 2^{2155425503305} is an apocalyptic number.

It is an amenable number.

2155425503305 is a deficient number, since it is larger than the sum of its proper divisors (431085100667).

2155425503305 is an equidigital number, since it uses as much as digits as its factorization.

2155425503305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431085100666.

The product of its (nonzero) digits is 450000, while the sum is 40.

The spelling of 2155425503305 in words is "two trillion, one hundred fifty-five billion, four hundred twenty-five million, five hundred three thousand, three hundred five".