51040144 has 20 divisors (see below), whose sum is σ = 99017100. Its totient is φ = 25487360.

The previous prime is 51040141. The next prime is 51040153. The reversal of 51040144 is 44104015.

It can be written as a sum of positive squares in 2 ways, for example, as 48441600 + 2598544 = 6960^2 + 1612^2 .

It is not an unprimeable number, because it can be changed into a prime (51040141) 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, 15264 + ... + 18304.

It is an arithmetic number, because the mean of its divisors is an integer number (4950855).

Almost surely, 2^51040144 is an apocalyptic number.

It is an amenable number.

51040144 is a deficient number, since it is larger than the sum of its proper divisors (47976956).

51040144 is a wasteful number, since it uses less digits than its factorization.

51040144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098 (or 4092 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 51040144 is about 7144.2385178548. The cubic root of 51040144 is about 370.9402528489.

Adding to 51040144 its reverse (44104015), we get a palindrome (95144159).

The spelling of 51040144 in words is "fifty-one million, forty thousand, one hundred forty-four".