51144404 has 6 divisors (see below), whose sum is σ = 89502714. Its totient is φ = 25572200.

The previous prime is 51144403. The next prime is 51144419. The reversal of 51144404 is 40444115.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51122500 + 21904 = 7150^2 + 148^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51144404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51144403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6393047 + ... + 6393054.

It is an arithmetic number, because the mean of its divisors is an integer number (14917119).

Almost surely, 2^51144404 is an apocalyptic number.

It is an amenable number.

51144404 is a deficient number, since it is larger than the sum of its proper divisors (38358310).

51144404 is a wasteful number, since it uses less digits than its factorization.

51144404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12786105 (or 12786103 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 51144404 is about 7151.5315842133. The cubic root of 51144404 is about 371.1926550054.

Adding to 51144404 its reverse (40444115), we get a palindrome (91588519).

The spelling of 51144404 in words is "fifty-one million, one hundred forty-four thousand, four hundred four".