51333040 has 60 divisors (see below), whose sum is σ = 131210352. Its totient is φ = 18663040.

The previous prime is 51333031. The next prime is 51333043. The reversal of 51333040 is 4033315.

51333040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51332999 and 51333017.

It is not an unprimeable number, because it can be changed into a prime (51333043) 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 11 ways as a sum of consecutive naturals, for example, 7029 + ... + 12331.

Almost surely, 2^51333040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51333040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65605176).

51333040 is an abundant number, since it is smaller than the sum of its proper divisors (79877312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51333040 is a wasteful number, since it uses less digits than its factorization.

51333040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5338 (or 5321 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 51333040 is about 7164.7079493864. The cubic root of 51333040 is about 371.6484519439.

Adding to 51333040 its reverse (4033315), we get a palindrome (55366355).

The spelling of 51333040 in words is "fifty-one million, three hundred thirty-three thousand, forty".