51061731 has 8 divisors (see below), whose sum is σ = 77808384. Its totient is φ = 29178120.

The previous prime is 51061723. The next prime is 51061741. The reversal of 51061731 is 13716015.

51061731 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 not a de Polignac number, because 51061731 - 2³ = 51061723 is a prime.

It is a super-2 number, since 2×51061731² = 5214600745432722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51061711) 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, 1215735 + ... + 1215776.

It is an arithmetic number, because the mean of its divisors is an integer number (9726048).

Almost surely, 2^51061731 is an apocalyptic number.

51061731 is a deficient number, since it is larger than the sum of its proper divisors (26746653).

51061731 is a wasteful number, since it uses less digits than its factorization.

51061731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431521.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 51061731 is about 7145.7491559668. The cubic root of 51061731 is about 370.9925408322.

Adding to 51061731 its reverse (13716015), we get a palindrome (64777746).

The spelling of 51061731 in words is "fifty-one million, sixty-one thousand, seven hundred thirty-one".