51814040 has 32 divisors (see below), whose sum is σ = 116948880. Its totient is φ = 20660352.

The previous prime is 51813997. The next prime is 51814043. The reversal of 51814040 is 4041815.

51814040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51814040² = 5369389482243200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51813997 and 51814015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51814043) 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, 12014 + ... + 15746.

Almost surely, 2^51814040 is an apocalyptic number.

It is an amenable number.

51814040 is an abundant number, since it is smaller than the sum of its proper divisors (65134840).

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

51814040 is a wasteful number, since it uses less digits than its factorization.

51814040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091 (or 4087 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 51814040 is about 7198.1969964707. The cubic root of 51814040 is about 372.8056497698.

Adding to 51814040 its reverse (4041815), we get a palindrome (55855855).

The spelling of 51814040 in words is "fifty-one million, eight hundred fourteen thousand, forty".