2557798531 has 2 divisors, whose sum is σ = 2557798532. Its totient is φ = 2557798530.

The previous prime is 2557798459. The next prime is 2557798543. The reversal of 2557798531 is 1358977552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2557798531 - 2¹⁹ = 2557274243 is a prime.

It is a super-2 number, since 2×2557798531² = 13084666650371515922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2557798931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278899265 + 1278899266.

It is an arithmetic number, because the mean of its divisors is an integer number (1278899266).

Almost surely, 2^2557798531 is an apocalyptic number.

2557798531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557798531 is an equidigital number, since it uses as much as digits as its factorization.

2557798531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646000, while the sum is 52.

The square root of 2557798531 is about 50574.6827078529. The cubic root of 2557798531 is about 1367.5885137337.

The spelling of 2557798531 in words is "two billion, five hundred fifty-seven million, seven hundred ninety-eight thousand, five hundred thirty-one".