51132542269 has 4 divisors (see below), whose sum is σ = 51138731196. Its totient is φ = 51126353344.

The previous prime is 51132542231. The next prime is 51132542273. The reversal of 51132542269 is 96224523115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28681116025 + 22451426244 = 169355^2 + 149838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51132542269 is a prime.

It is a super-2 number, since 2×51132542269² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132542969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3082054 + ... + 3098599.

It is an arithmetic number, because the mean of its divisors is an integer number (12784682799).

Almost surely, 2^51132542269 is an apocalyptic number.

It is an amenable number.

51132542269 is a deficient number, since it is larger than the sum of its proper divisors (6188927).

51132542269 is an equidigital number, since it uses as much as digits as its factorization.

51132542269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6188926.

The product of its digits is 129600, while the sum is 40.

The spelling of 51132542269 in words is "fifty-one billion, one hundred thirty-two million, five hundred forty-two thousand, two hundred sixty-nine".