51731269 has 4 divisors (see below), whose sum is σ = 51837120. Its totient is φ = 51625420.

The previous prime is 51731263. The next prime is 51731293. The reversal of 51731269 is 96213715.

51731269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51731269 - 2³ = 51731261 is a prime.

It is a super-2 number, since 2×51731269² = 5352248384700722, 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 (51731261) 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 3 ways as a sum of consecutive naturals, for example, 52189 + ... + 53170.

It is an arithmetic number, because the mean of its divisors is an integer number (12959280).

Almost surely, 2^51731269 is an apocalyptic number.

It is an amenable number.

51731269 is a deficient number, since it is larger than the sum of its proper divisors (105851).

51731269 is a wasteful number, since it uses less digits than its factorization.

51731269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105850.

The product of its digits is 11340, while the sum is 34.

The square root of 51731269 is about 7192.4452726455. The cubic root of 51731269 is about 372.6070295871.

The spelling of 51731269 in words is "fifty-one million, seven hundred thirty-one thousand, two hundred sixty-nine".