2051017155 has 36 divisors (see below), whose sum is σ = 3907678320. Its totient is φ = 994429920.

The previous prime is 2051017127. The next prime is 2051017231. The reversal of 2051017155 is 5517101502.

It is not a de Polignac number, because 2051017155 - 2⁵ = 2051017123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 182895 + ... + 193784.

It is an arithmetic number, because the mean of its divisors is an integer number (108546620).

Almost surely, 2^2051017155 is an apocalyptic number.

2051017155 is a deficient number, since it is larger than the sum of its proper divisors (1856661165).

2051017155 is a wasteful number, since it uses less digits than its factorization.

2051017155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376712 (or 376698 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The square root of 2051017155 is about 45288.1568955947. The cubic root of 2051017155 is about 1270.5441599313.

Adding to 2051017155 its reverse (5517101502), we get a palindrome (7568118657).

The spelling of 2051017155 in words is "two billion, fifty-one million, seventeen thousand, one hundred fifty-five".