2570543981 has 2 divisors, whose sum is σ = 2570543982. Its totient is φ = 2570543980.

The previous prime is 2570543971. The next prime is 2570544049. The reversal of 2570543981 is 1893450752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1822521481 + 748022500 = 42691^2 + 27350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2570543981 is a prime.

It is a super-2 number, since 2×2570543981² = 13215392716510656722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2570543971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1285271990 + 1285271991.

It is an arithmetic number, because the mean of its divisors is an integer number (1285271991).

Almost surely, 2^2570543981 is an apocalyptic number.

It is an amenable number.

2570543981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2570543981 is an equidigital number, since it uses as much as digits as its factorization.

2570543981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 2570543981 is about 50700.5323542071. The cubic root of 2570543981 is about 1369.8563049245.

The spelling of 2570543981 in words is "two billion, five hundred seventy million, five hundred forty-three thousand, nine hundred eighty-one".