2478302557 has 2 divisors, whose sum is σ = 2478302558. Its totient is φ = 2478302556.

The previous prime is 2478302543. The next prime is 2478302569. The reversal of 2478302557 is 7552038742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1611942201 + 866360356 = 40149^2 + 29434^2 .

It is a cyclic number.

It is not a de Polignac number, because 2478302557 - 2⁷ = 2478302429 is a prime.

It is a super-2 number, since 2×2478302557² = 12283967128065476498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2478302537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239151278 + 1239151279.

It is an arithmetic number, because the mean of its divisors is an integer number (1239151279).

Almost surely, 2^2478302557 is an apocalyptic number.

It is an amenable number.

2478302557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478302557 is an equidigital number, since it uses as much as digits as its factorization.

2478302557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 470400, while the sum is 43.

The square root of 2478302557 is about 49782.5527368776. The cubic root of 2478302557 is about 1353.2709994114.

The spelling of 2478302557 in words is "two billion, four hundred seventy-eight million, three hundred two thousand, five hundred fifty-seven".