51042260 has 12 divisors (see below), whose sum is σ = 107188788. Its totient is φ = 20416896.

The previous prime is 51042241. The next prime is 51042263. The reversal of 51042260 is 6224015.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8375236 + 42667024 = 2894^2 + 6532^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2552113 = 51042260 / (5 + 1 + 0 + 4 + 2 + 2 + 6 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51042263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276037 + ... + 1276076.

It is an arithmetic number, because the mean of its divisors is an integer number (8932399).

Almost surely, 2^51042260 is an apocalyptic number.

It is an amenable number.

51042260 is an abundant number, since it is smaller than the sum of its proper divisors (56146528).

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

51042260 is a wasteful number, since it uses less digits than its factorization.

51042260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552122 (or 2552120 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51042260 is about 7144.3866076802. The cubic root of 51042260 is about 370.9453788710.

Adding to 51042260 its reverse (6224015), we get a palindrome (57266275).

The spelling of 51042260 in words is "fifty-one million, forty-two thousand, two hundred sixty".