2581247061 has 8 divisors (see below), whose sum is σ = 3824069760. Its totient is φ = 1720831356.

The previous prime is 2581247057. The next prime is 2581247101. The reversal of 2581247061 is 1607421852.

2581247061 is a `hidden beast` number, since 2 + 581 + 2 + 4 + 70 + 6 + 1 = 666.

It is not a de Polignac number, because 2581247061 - 2² = 2581247057 is a prime.

It is a super-2 number, since 2×2581247061² = 13325672779842275442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581247161) 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 in 7 ways as a sum of consecutive naturals, for example, 47800845 + ... + 47800898.

It is an arithmetic number, because the mean of its divisors is an integer number (478008720).

Almost surely, 2^2581247061 is an apocalyptic number.

It is an amenable number.

2581247061 is a deficient number, since it is larger than the sum of its proper divisors (1242822699).

2581247061 is an equidigital number, since it uses as much as digits as its factorization.

2581247061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95601752 (or 95601746 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 2581247061 is about 50805.9746584986. The cubic root of 2581247061 is about 1371.7549146507.

The spelling of 2581247061 in words is "two billion, five hundred eighty-one million, two hundred forty-seven thousand, sixty-one".