51317404 has 48 divisors (see below), whose sum is σ = 99348480. Its totient is φ = 23103360.

The previous prime is 51317401. The next prime is 51317417. The reversal of 51317404 is 40471315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51317401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133797 + ... + 134179.

It is an arithmetic number, because the mean of its divisors is an integer number (2069760).

Almost surely, 2^51317404 is an apocalyptic number.

It is an amenable number.

51317404 is a deficient number, since it is larger than the sum of its proper divisors (48031076).

51317404 is a wasteful number, since it uses less digits than its factorization.

51317404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 51317404 is about 7163.6166843292. The cubic root of 51317404 is about 371.6107135120.

Adding to 51317404 its reverse (40471315), we get a palindrome (91788719).

The spelling of 51317404 in words is "fifty-one million, three hundred seventeen thousand, four hundred four".