2478133481 has 4 divisors (see below), whose sum is σ = 2485234500. Its totient is φ = 2471032464.

The previous prime is 2478133477. The next prime is 2478133487. The reversal of 2478133481 is 1843318742.

2478133481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1593606400 + 884527081 = 39920^2 + 29741^2 .

It is a cyclic number.

It is not a de Polignac number, because 2478133481 - 2² = 2478133477 is a prime.

It is a super-2 number, since 2×2478133481² = 12282291099306354722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2478133487) 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, 3549986 + ... + 3550683.

It is an arithmetic number, because the mean of its divisors is an integer number (621308625).

Almost surely, 2^2478133481 is an apocalyptic number.

It is an amenable number.

2478133481 is a deficient number, since it is larger than the sum of its proper divisors (7101019).

2478133481 is an equidigital number, since it uses as much as digits as its factorization.

2478133481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101018.

The product of its digits is 129024, while the sum is 41.

The square root of 2478133481 is about 49780.8545627734. The cubic root of 2478133481 is about 1353.2402242006.

The spelling of 2478133481 in words is "two billion, four hundred seventy-eight million, one hundred thirty-three thousand, four hundred eighty-one".