2125226691 has 24 divisors (see below), whose sum is σ = 3629290080. Its totient is φ = 1172537856.

The previous prime is 2125226689. The next prime is 2125226717. The reversal of 2125226691 is 1966225212.

It is not a de Polignac number, because 2125226691 - 2¹ = 2125226689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2125226651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 579790 + ... + 583443.

It is an arithmetic number, because the mean of its divisors is an integer number (151220420).

Almost surely, 2^2125226691 is an apocalyptic number.

2125226691 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2125226691 is a deficient number, since it is larger than the sum of its proper divisors (1504063389).

2125226691 is a wasteful number, since it uses less digits than its factorization.

2125226691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163275 (or 1163272 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 2125226691 is about 46100.1810300133. The cubic root of 2125226691 is about 1285.6865102836.

The spelling of 2125226691 in words is "two billion, one hundred twenty-five million, two hundred twenty-six thousand, six hundred ninety-one".