51087269 has 8 divisors (see below), whose sum is σ = 53209728. Its totient is φ = 49003920.

The previous prime is 51087259. The next prime is 51087313. The reversal of 51087269 is 96278015.

51087269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51087269 - 2⁸ = 51087013 is a prime.

It is a super-2 number, since 2×51087269² = 5219818107756722, 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 (51087259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7097 + ... + 12350.

It is an arithmetic number, because the mean of its divisors is an integer number (6651216).

Almost surely, 2^51087269 is an apocalyptic number.

It is an amenable number.

51087269 is a deficient number, since it is larger than the sum of its proper divisors (2122459).

51087269 is a wasteful number, since it uses less digits than its factorization.

51087269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19555.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 51087269 is about 7147.5358690950. The cubic root of 51087269 is about 371.0543798929.

It can be divided in two parts, 5 and 1087269, that multiplied together give a palindrome (5436345).

The spelling of 51087269 in words is "fifty-one million, eighty-seven thousand, two hundred sixty-nine".