2520181901 has 2 divisors, whose sum is σ = 2520181902. Its totient is φ = 2520181900.

The previous prime is 2520181879. The next prime is 2520181903. The reversal of 2520181901 is 1091810252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2447676676 + 72505225 = 49474^2 + 8515^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520181901 - 2⁶ = 2520181837 is a prime.

Together with 2520181903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2520181903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260090950 + 1260090951.

It is an arithmetic number, because the mean of its divisors is an integer number (1260090951).

Almost surely, 2^2520181901 is an apocalyptic number.

It is an amenable number.

2520181901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520181901 is an equidigital number, since it uses as much as digits as its factorization.

2520181901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 2520181901 is about 50201.4133366781. The cubic root of 2520181901 is about 1360.8511650262.

The spelling of 2520181901 in words is "two billion, five hundred twenty million, one hundred eighty-one thousand, nine hundred one".