51440523 has 8 divisors (see below), whose sum is σ = 69611328. Its totient is φ = 33781704.

The previous prime is 51440449. The next prime is 51440531. The reversal of 51440523 is 32504415.

51440523 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 51440523 - 2²² = 47246219 is a prime.

It is a super-2 number, since 2×51440523² = 5292254813027058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51440493 and 51440502.

It is not an unprimeable number, because it can be changed into a prime (51440023) 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, 127761 + ... + 128162.

It is an arithmetic number, because the mean of its divisors is an integer number (8701416).

Almost surely, 2^51440523 is an apocalyptic number.

51440523 is a deficient number, since it is larger than the sum of its proper divisors (18170805).

51440523 is a wasteful number, since it uses less digits than its factorization.

51440523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255993.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 51440523 is about 7172.2048911057. The cubic root of 51440523 is about 371.9076614959.

Adding to 51440523 its reverse (32504415), we get a palindrome (83944938).

The spelling of 51440523 in words is "fifty-one million, four hundred forty thousand, five hundred twenty-three".