51131773 has 16 divisors (see below), whose sum is σ = 65235456. Its totient is φ = 38913840.

The previous prime is 51131761. The next prime is 51131777. The reversal of 51131773 is 37713115.

It is a de Polignac number, because none of the positive numbers 2^k-51131773 is a prime.

It is a super-2 number, since 2×51131773² = 5228916420247058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51131777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4411 + ... + 11032.

It is an arithmetic number, because the mean of its divisors is an integer number (4077216).

Almost surely, 2^51131773 is an apocalyptic number.

It is an amenable number.

51131773 is a deficient number, since it is larger than the sum of its proper divisors (14103683).

51131773 is a wasteful number, since it uses less digits than its factorization.

51131773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15504.

The product of its digits is 2205, while the sum is 28.

The square root of 51131773 is about 7150.6484321354. The cubic root of 51131773 is about 371.1620949957.

Adding to 51131773 its reverse (37713115), we get a palindrome (88844888).

It can be divided in two parts, 5113 and 1773, that added together give a palindrome (6886).

The spelling of 51131773 in words is "fifty-one million, one hundred thirty-one thousand, seven hundred seventy-three".