2478400231 has 2 divisors, whose sum is σ = 2478400232. Its totient is φ = 2478400230.

The previous prime is 2478400207. The next prime is 2478400247. The reversal of 2478400231 is 1320048742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2478400231 - 2⁹ = 2478399719 is a prime.

It is a super-2 number, since 2×2478400231² = 12284935410041706722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2478400193 and 2478400202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2478400201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239200115 + 1239200116.

It is an arithmetic number, because the mean of its divisors is an integer number (1239200116).

Almost surely, 2^2478400231 is an apocalyptic number.

2478400231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478400231 is an equidigital number, since it uses as much as digits as its factorization.

2478400231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 2478400231 is about 49783.5337335549. The cubic root of 2478400231 is about 1353.2887773934.

Adding to 2478400231 its reverse (1320048742), we get a palindrome (3798448973).

The spelling of 2478400231 in words is "two billion, four hundred seventy-eight million, four hundred thousand, two hundred thirty-one".