51404051 has 4 divisors (see below), whose sum is σ = 51913104. Its totient is φ = 50895000.

The previous prime is 51403991. The next prime is 51404053. The reversal of 51404051 is 15040415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51404051 - 2¹⁸ = 51141907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51404053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254375 + ... + 254576.

It is an arithmetic number, because the mean of its divisors is an integer number (12978276).

Almost surely, 2^51404051 is an apocalyptic number.

51404051 is a deficient number, since it is larger than the sum of its proper divisors (509053).

51404051 is a wasteful number, since it uses less digits than its factorization.

51404051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509052.

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

The square root of 51404051 is about 7169.6618469772. The cubic root of 51404051 is about 371.8197449245.

Adding to 51404051 its reverse (15040415), we get a palindrome (66444466).

The spelling of 51404051 in words is "fifty-one million, four hundred four thousand, fifty-one".