2551234991 has 2 divisors, whose sum is σ = 2551234992. Its totient is φ = 2551234990.

The previous prime is 2551234969. The next prime is 2551235017. The reversal of 2551234991 is 1994321552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2551234991 - 2³⁰ = 1477493167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551134991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275617495 + 1275617496.

It is an arithmetic number, because the mean of its divisors is an integer number (1275617496).

Almost surely, 2^2551234991 is an apocalyptic number.

2551234991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551234991 is an equidigital number, since it uses as much as digits as its factorization.

2551234991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 41.

The square root of 2551234991 is about 50509.7514446468. The cubic root of 2551234991 is about 1366.4177268638.

The spelling of 2551234991 in words is "two billion, five hundred fifty-one million, two hundred thirty-four thousand, nine hundred ninety-one".