2131205751 has 12 divisors (see below), whose sum is σ = 3079121760. Its totient is φ = 1420474560.

The previous prime is 2131205749. The next prime is 2131205759. The reversal of 2131205751 is 1575021312.

It is not a de Polignac number, because 2131205751 - 2¹ = 2131205749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131205759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17410 + ... + 67568.

It is an arithmetic number, because the mean of its divisors is an integer number (256593480).

Almost surely, 2^2131205751 is an apocalyptic number.

2131205751 is a deficient number, since it is larger than the sum of its proper divisors (947916009).

2131205751 is a wasteful number, since it uses less digits than its factorization.

2131205751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54886 (or 54883 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 2131205751 is about 46164.9840355220. The cubic root of 2131205751 is about 1286.8910875138.

The spelling of 2131205751 in words is "two billion, one hundred thirty-one million, two hundred five thousand, seven hundred fifty-one".