2125581554 has 16 divisors (see below), whose sum is σ = 3244868640. Its totient is φ = 1043986080.

The previous prime is 2125581551. The next prime is 2125581559. The reversal of 2125581554 is 4551855212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2125581551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168677 + ... + 180839.

It is an arithmetic number, because the mean of its divisors is an integer number (202804290).

Almost surely, 2^2125581554 is an apocalyptic number.

2125581554 is a deficient number, since it is larger than the sum of its proper divisors (1119287086).

2125581554 is a wasteful number, since it uses less digits than its factorization.

2125581554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13705.

The product of its digits is 80000, while the sum is 38.

The square root of 2125581554 is about 46104.0296937263. The cubic root of 2125581554 is about 1285.7580661294.

The spelling of 2125581554 in words is "two billion, one hundred twenty-five million, five hundred eighty-one thousand, five hundred fifty-four".