2011581057 has 8 divisors (see below), whose sum is σ = 2697092640. Its totient is φ = 1333561760.

The previous prime is 2011581043. The next prime is 2011581101. The reversal of 2011581057 is 7501851102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2011581057 - 2⁶ = 2011580993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011581757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1872444 + ... + 1873517.

It is an arithmetic number, because the mean of its divisors is an integer number (337136580).

Almost surely, 2^2011581057 is an apocalyptic number.

It is an amenable number.

2011581057 is a deficient number, since it is larger than the sum of its proper divisors (685511583).

2011581057 is a wasteful number, since it uses less digits than its factorization.

2011581057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746143.

The product of its (nonzero) digits is 2800, while the sum is 30.

The square root of 2011581057 is about 44850.6528046137. The cubic root of 2011581057 is about 1262.3482405827.

The spelling of 2011581057 in words is "two billion, eleven million, five hundred eighty-one thousand, fifty-seven".