2478833281 has 4 divisors (see below), whose sum is σ = 2481102292. Its totient is φ = 2476564272.

The previous prime is 2478833249. The next prime is 2478833293. The reversal of 2478833281 is 1823388742.

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 1985593600 + 493239681 = 44560^2 + 22209^2 .

It is a cyclic number.

It is not a de Polignac number, because 2478833281 - 2⁵ = 2478833249 is a prime.

It is a super-2 number, since 2×2478833281² = 12289228869986449922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2478833381) 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, 1132866 + ... + 1135051.

It is an arithmetic number, because the mean of its divisors is an integer number (620275573).

Almost surely, 2^2478833281 is an apocalyptic number.

It is an amenable number.

2478833281 is a deficient number, since it is larger than the sum of its proper divisors (2269011).

2478833281 is a wasteful number, since it uses less digits than its factorization.

2478833281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269010.

The product of its digits is 516096, while the sum is 46.

The square root of 2478833281 is about 49787.8828732454. The cubic root of 2478833281 is about 1353.3675926937.

It can be divided in two parts, 24788 and 33281, that multiplied together give a palindrome (824969428).

The spelling of 2478833281 in words is "two billion, four hundred seventy-eight million, eight hundred thirty-three thousand, two hundred eighty-one".