2051357817 has 16 divisors (see below), whose sum is σ = 2818080000. Its totient is φ = 1326619392.

The previous prime is 2051357813. The next prime is 2051357831. The reversal of 2051357817 is 7187531502.

It is not a de Polignac number, because 2051357817 - 2² = 2051357813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2051357813) 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 15 ways as a sum of consecutive naturals, for example, 48442 + ... + 80307.

It is an arithmetic number, because the mean of its divisors is an integer number (176130000).

Almost surely, 2^2051357817 is an apocalyptic number.

It is an amenable number.

2051357817 is a deficient number, since it is larger than the sum of its proper divisors (766722183).

2051357817 is a wasteful number, since it uses less digits than its factorization.

2051357817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128912.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 2051357817 is about 45291.9177889389. The cubic root of 2051357817 is about 1270.6144993647.

The spelling of 2051357817 in words is "two billion, fifty-one million, three hundred fifty-seven thousand, eight hundred seventeen".