51027240 has 256 divisors, whose sum is σ = 182476800. Its totient is φ = 11289600.

The previous prime is 51027239. The next prime is 51027253. The reversal of 51027240 is 4272015.

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 63 ways as a sum of consecutive naturals, for example, 1186659 + ... + 1186701.

It is an arithmetic number, because the mean of its divisors is an integer number (712800).

Almost surely, 2^51027240 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 51027240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91238400).

51027240 is an abundant number, since it is smaller than the sum of its proper divisors (131449560).

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

51027240 is a wasteful number, since it uses less digits than its factorization.

51027240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 51027240 is about 7143.3353554205. The cubic root of 51027240 is about 370.9089897679.

Adding to 51027240 its reverse (4272015), we get a palindrome (55299255).

The spelling of 51027240 in words is "fifty-one million, twenty-seven thousand, two hundred forty".