51488269 has 6 divisors (see below), whose sum is σ = 59894574. Its totient is φ = 44132760.

The previous prime is 51488267. The next prime is 51488273. The reversal of 51488269 is 96288415.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37515625 + 13972644 = 6125^2 + 3738^2 .

It is not a de Polignac number, because 51488269 - 2¹ = 51488267 is a prime.

It is a super-2 number, since 2×51488269² = 5302083689232722, which 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 (51488263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 525342 + ... + 525439.

It is an arithmetic number, because the mean of its divisors is an integer number (9982429).

Almost surely, 2^51488269 is an apocalyptic number.

It is an amenable number.

51488269 is a deficient number, since it is larger than the sum of its proper divisors (8406305).

51488269 is a wasteful number, since it uses less digits than its factorization.

51488269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050795 (or 1050788 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 51488269 is about 7175.5326631547. The cubic root of 51488269 is about 372.0226915090.

The spelling of 51488269 in words is "fifty-one million, four hundred eighty-eight thousand, two hundred sixty-nine".