2425857881 has 2 divisors, whose sum is σ = 2425857882. Its totient is φ = 2425857880.

The previous prime is 2425857853. The next prime is 2425857901. The reversal of 2425857881 is 1887585242.

2425857881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1260250000 + 1165607881 = 35500^2 + 34141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2425857881 is a prime.

It is a super-2 number, since 2×2425857881² = 11769572917619620322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2425857481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1212928940 + 1212928941.

It is an arithmetic number, because the mean of its divisors is an integer number (1212928941).

Almost surely, 2^2425857881 is an apocalyptic number.

It is an amenable number.

2425857881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2425857881 is an equidigital number, since it uses as much as digits as its factorization.

2425857881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1433600, while the sum is 50.

The square root of 2425857881 is about 49252.9987005867. The cubic root of 2425857881 is about 1343.6571001476.

The spelling of 2425857881 in words is "two billion, four hundred twenty-five million, eight hundred fifty-seven thousand, eight hundred eighty-one".