51863040 has 120 divisors (see below), whose sum is σ = 179696088. Its totient is φ = 13824000.

The previous prime is 51863033. The next prime is 51863057. The reversal of 51863040 is 4036815.

It is a tau number, because it is divible by the number of its divisors (120).

It is a junction number, because it is equal to n+sod(n) for n = 51862995 and 51863013.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 21915 + ... + 24165.

Almost surely, 2^51863040 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 51863040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89848044).

51863040 is an abundant number, since it is smaller than the sum of its proper divisors (127833048).

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

51863040 is a wasteful number, since it uses less digits than its factorization.

51863040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280 (or 2261 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 51863040 is about 7201.5998222617. The cubic root of 51863040 is about 372.9231322218.

Adding to 51863040 its reverse (4036815), we get a palindrome (55899855).

The spelling of 51863040 in words is "fifty-one million, eight hundred sixty-three thousand, forty".