2500048981 has 2 divisors, whose sum is σ = 2500048982. Its totient is φ = 2500048980.

The previous prime is 2500048891. The next prime is 2500048987. The reversal of 2500048981 is 1898400052.

Together with previous prime (2500048891) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1258120900 + 1241928081 = 35470^2 + 35241^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500048981 - 2¹¹ = 2500046933 is a prime.

It is a super-2 number, since 2×2500048981² = 12500489814798276722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2500048981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2500048987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250024490 + 1250024491.

It is an arithmetic number, because the mean of its divisors is an integer number (1250024491).

Almost surely, 2^2500048981 is an apocalyptic number.

It is an amenable number.

2500048981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500048981 is an equidigital number, since it uses as much as digits as its factorization.

2500048981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 2500048981 is about 50000.4898076009. The cubic root of 2500048981 is about 1357.2176718989.

The spelling of 2500048981 in words is "two billion, five hundred million, forty-eight thousand, nine hundred eighty-one".