51404506 has 8 divisors (see below), whose sum is σ = 77370804. Its totient is φ = 25614240.

The previous prime is 51404503. The next prime is 51404527. The reversal of 51404506 is 60540415.

51404506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 49829481 + 1575025 = 7059^2 + 1255^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51404503) 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, 43275 + ... + 44446.

Almost surely, 2^51404506 is an apocalyptic number.

51404506 is a deficient number, since it is larger than the sum of its proper divisors (25966298).

51404506 is a wasteful number, since it uses less digits than its factorization.

51404506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88016.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51404506 is about 7169.6935778316. The cubic root of 51404506 is about 371.8208419683.

The spelling of 51404506 in words is "fifty-one million, four hundred four thousand, five hundred six".