51435040 has 24 divisors (see below), whose sum is σ = 121515660. Its totient is φ = 20573952.

The previous prime is 51435023. The next prime is 51435053. The reversal of 51435040 is 4053415.

It can be written as a sum of positive squares in 2 ways, for example, as 49617936 + 1817104 = 7044^2 + 1348^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160575 + ... + 160894.

Almost surely, 2^51435040 is an apocalyptic number.

It is an amenable number.

51435040 is an abundant number, since it is smaller than the sum of its proper divisors (70080620).

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

51435040 is a wasteful number, since it uses less digits than its factorization.

51435040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321484 (or 321476 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51435040 is about 7171.8226414211. The cubic root of 51435040 is about 371.8944472564.

Adding to 51435040 its reverse (4053415), we get a palindrome (55488455).

The spelling of 51435040 in words is "fifty-one million, four hundred thirty-five thousand, forty".