51840523 has 8 divisors (see below), whose sum is σ = 60691680. Its totient is φ = 43350720.

The previous prime is 51840491. The next prime is 51840539. The reversal of 51840523 is 32504815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51840523 - 2⁵ = 51840491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51840491 and 51840500.

It is not an unprimeable number, because it can be changed into a prime (51840553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90028 + ... + 90601.

It is an arithmetic number, because the mean of its divisors is an integer number (7586460).

Almost surely, 2^51840523 is an apocalyptic number.

51840523 is a deficient number, since it is larger than the sum of its proper divisors (8851157).

51840523 is a wasteful number, since it uses less digits than its factorization.

51840523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180677.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 51840523 is about 7200.0363193528. The cubic root of 51840523 is about 372.8691546320.

It can be divided in two parts, 518 and 40523, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 51840523 in words is "fifty-one million, eight hundred forty thousand, five hundred twenty-three".