51501404 has 12 divisors (see below), whose sum is σ = 90533184. Its totient is φ = 25634784.

The previous prime is 51501397. The next prime is 51501409. The reversal of 51501404 is 40410515.

51501404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51501404² = 5304789227942432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51501409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27977 + ... + 29760.

It is an arithmetic number, because the mean of its divisors is an integer number (7544432).

Almost surely, 2^51501404 is an apocalyptic number.

It is an amenable number.

51501404 is a deficient number, since it is larger than the sum of its proper divisors (39031780).

51501404 is a wasteful number, since it uses less digits than its factorization.

51501404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57964 (or 57962 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 51501404 is about 7176.4478678522. The cubic root of 51501404 is about 372.0543239739.

Adding to 51501404 its reverse (40410515), we get a palindrome (91911919).

The spelling of 51501404 in words is "fifty-one million, five hundred one thousand, four hundred four".