51460240 has 40 divisors (see below), whose sum is σ = 128851128. Its totient is φ = 19000320.

The previous prime is 51460231. The next prime is 51460243. The reversal of 51460240 is 4206415.

It can be written as a sum of positive squares in 4 ways, for example, as 309136 + 51151104 = 556^2 + 7152^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (51460243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23701 + ... + 25780.

Almost surely, 2^51460240 is an apocalyptic number.

It is an amenable number.

51460240 is an abundant number, since it is smaller than the sum of its proper divisors (77390888).

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

51460240 is a wasteful number, since it uses less digits than its factorization.

51460240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49507 (or 49501 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 51460240 is about 7173.5793018548. The cubic root of 51460240 is about 371.9551724609.

Adding to 51460240 its reverse (4206415), we get a palindrome (55666655).

The spelling of 51460240 in words is "fifty-one million, four hundred sixty thousand, two hundred forty".