51346789 has 8 divisors (see below), whose sum is σ = 55441400. Its totient is φ = 47272896.

The previous prime is 51346727. The next prime is 51346829. The reversal of 51346789 is 98764315.

It can be written as a sum of positive squares in 4 ways, for example, as 2696164 + 48650625 = 1642^2 + 6975^2 .

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 51346789 - 2⁷ = 51346661 is a prime.

It is a super-2 number, since 2×51346789² = 5272985481221042, 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 (51376789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187 + ... + 10135.

It is an arithmetic number, because the mean of its divisors is an integer number (6930175).

Almost surely, 2^51346789 is an apocalyptic number.

It is an amenable number.

51346789 is a deficient number, since it is larger than the sum of its proper divisors (4094611).

51346789 is a wasteful number, since it uses less digits than its factorization.

51346789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359.

The product of its digits is 181440, while the sum is 43.

The square root of 51346789 is about 7165.6673799445. The cubic root of 51346789 is about 371.6816296558.

The spelling of 51346789 in words is "fifty-one million, three hundred forty-six thousand, seven hundred eighty-nine".