2125581551 has 2 divisors, whose sum is σ = 2125581552. Its totient is φ = 2125581550.

The previous prime is 2125581541. The next prime is 2125581559. The reversal of 2125581551 is 1551855212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2125581551 - 2⁶ = 2125581487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125581559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062790775 + 1062790776.

It is an arithmetic number, because the mean of its divisors is an integer number (1062790776).

Almost surely, 2^2125581551 is an apocalyptic number.

2125581551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125581551 is an equidigital number, since it uses as much as digits as its factorization.

2125581551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20000, while the sum is 35.

The square root of 2125581551 is about 46104.0296611912. The cubic root of 2125581551 is about 1285.7580655245.

The spelling of 2125581551 in words is "two billion, one hundred twenty-five million, five hundred eighty-one thousand, five hundred fifty-one".