2551132989 has 10 divisors (see below), whose sum is σ = 3810951870. Its totient is φ = 1700755272.

The previous prime is 2551132979. The next prime is 2551132993. The reversal of 2551132989 is 9892311552.

2551132989 is a `hidden beast` number, since 2 + 551 + 1 + 3 + 2 + 98 + 9 = 666.

2551132989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2528380089 + 22752900 = 50283^2 + 4770^2 .

It is not a de Polignac number, because 2551132989 - 2⁴ = 2551132973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551132949) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15747654 + ... + 15747815.

It is an arithmetic number, because the mean of its divisors is an integer number (381095187).

Almost surely, 2^2551132989 is an apocalyptic number.

It is an amenable number.

2551132989 is a deficient number, since it is larger than the sum of its proper divisors (1259818881).

2551132989 is an equidigital number, since it uses as much as digits as its factorization.

2551132989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31495481 (or 31495472 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 2551132989 is about 50508.7417087379. The cubic root of 2551132989 is about 1366.3995161803.

The spelling of 2551132989 in words is "two billion, five hundred fifty-one million, one hundred thirty-two thousand, nine hundred eighty-nine".