51051040 has 24 divisors (see below), whose sum is σ = 120608460. Its totient is φ = 20420352.

The previous prime is 51051037. The next prime is 51051067. The reversal of 51051040 is 4015015.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46840336 + 4210704 = 6844^2 + 2052^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

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 3 ways as a sum of consecutive naturals, for example, 159375 + ... + 159694.

Almost surely, 2^51051040 is an apocalyptic number.

It is an amenable number.

51051040 is an abundant number, since it is smaller than the sum of its proper divisors (69557420).

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

51051040 is a wasteful number, since it uses less digits than its factorization.

51051040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319084 (or 319076 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51051040 is about 7145.0010496850. The cubic root of 51051040 is about 370.9666469582.

Adding to 51051040 its reverse (4015015), we get a palindrome (55066055).

The spelling of 51051040 in words is "fifty-one million, fifty-one thousand, forty".