2021992751 has 2 divisors, whose sum is σ = 2021992752. Its totient is φ = 2021992750.

The previous prime is 2021992649. The next prime is 2021992759. The reversal of 2021992751 is 1572991202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021992751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021992759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010996375 + 1010996376.

It is an arithmetic number, because the mean of its divisors is an integer number (1010996376).

Almost surely, 2^2021992751 is an apocalyptic number.

2021992751 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021992751 is an equidigital number, since it uses as much as digits as its factorization.

2021992751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 2021992751 is about 44966.5737075886. The cubic root of 2021992751 is about 1264.5224131003.

The spelling of 2021992751 in words is "two billion, twenty-one million, nine hundred ninety-two thousand, seven hundred fifty-one".