3121645055 has 4 divisors (see below), whose sum is σ = 3745974072. Its totient is φ = 2497316040.

The previous prime is 3121644997. The next prime is 3121645067. The reversal of 3121645055 is 5505461213.

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

It is not a de Polignac number, because 3121645055 - 2¹² = 3121640959 is a prime.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312164501 + ... + 312164510.

It is an arithmetic number, because the mean of its divisors is an integer number (936493518).

Almost surely, 2^3121645055 is an apocalyptic number.

3121645055 is a deficient number, since it is larger than the sum of its proper divisors (624329017).

3121645055 is an equidigital number, since it uses as much as digits as its factorization.

3121645055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624329016.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 3121645055 is about 55871.6838389537. The cubic root of 3121645055 is about 1461.4854861000.

The spelling of 3121645055 in words is "three billion, one hundred twenty-one million, six hundred forty-five thousand, fifty-five".