2551643132 has 6 divisors (see below), whose sum is σ = 4465375488. Its totient is φ = 1275821564.

The previous prime is 2551643131. The next prime is 2551643137. The reversal of 2551643132 is 2313461552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551643131) 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 as a sum of consecutive naturals, namely, 318955388 + ... + 318955395.

It is an arithmetic number, because the mean of its divisors is an integer number (744229248).

Almost surely, 2^2551643132 is an apocalyptic number.

It is an amenable number.

2551643132 is a deficient number, since it is larger than the sum of its proper divisors (1913732356).

2551643132 is a wasteful number, since it uses less digits than its factorization.

2551643132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637910787 (or 637910785 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 2551643132 is about 50513.7915029153. The cubic root of 2551643132 is about 1366.4905884861.

The spelling of 2551643132 in words is "two billion, five hundred fifty-one million, six hundred forty-three thousand, one hundred thirty-two".