51840723 has 8 divisors (see below), whose sum is σ = 75404736. Its totient is φ = 31418600.

The previous prime is 51840713. The next prime is 51840739. The reversal of 51840723 is 32704815.

51840723 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 51840723 - 2⁹ = 51840211 is a prime.

It is a super-2 number, since 2×51840723² = 5374921122325458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51840703) 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, 785433 + ... + 785498.

It is an arithmetic number, because the mean of its divisors is an integer number (9425592).

Almost surely, 2^51840723 is an apocalyptic number.

51840723 is a deficient number, since it is larger than the sum of its proper divisors (23564013).

51840723 is a wasteful number, since it uses less digits than its factorization.

51840723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570945.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 51840723 is about 7200.0502081583. The cubic root of 51840723 is about 372.8696341394.

The spelling of 51840723 in words is "fifty-one million, eight hundred forty thousand, seven hundred twenty-three".