51024140 has 96 divisors (see below), whose sum is σ = 120766464. Its totient is φ = 18017280.

The previous prime is 51024067. The next prime is 51024161. The reversal of 51024140 is 4142015.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495329 + ... + 495431.

It is an arithmetic number, because the mean of its divisors is an integer number (1257984).

Almost surely, 2^51024140 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 51024140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60383232).

51024140 is an abundant number, since it is smaller than the sum of its proper divisors (69742324).

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

51024140 is a wasteful number, since it uses less digits than its factorization.

51024140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 51024140 is about 7143.1183666519. The cubic root of 51024140 is about 370.9014784781.

Adding to 51024140 its reverse (4142015), we get a palindrome (55166155).

The spelling of 51024140 in words is "fifty-one million, twenty-four thousand, one hundred forty".