51004501 has 4 divisors (see below), whose sum is σ = 53222112. Its totient is φ = 48786892.

The previous prime is 51004469. The next prime is 51004507. The reversal of 51004501 is 10540015.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10540015 = 5 ⋅2108003.

It is a cyclic number.

It is not a de Polignac number, because 51004501 - 2⁵ = 51004469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51004507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108771 + ... + 1108816.

It is an arithmetic number, because the mean of its divisors is an integer number (13305528).

Almost surely, 2^51004501 is an apocalyptic number.

It is an amenable number.

51004501 is a deficient number, since it is larger than the sum of its proper divisors (2217611).

51004501 is a wasteful number, since it uses less digits than its factorization.

51004501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217610.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51004501 is about 7141.7435546231. The cubic root of 51004501 is about 370.8538861759.

Adding to 51004501 its reverse (10540015), we get a palindrome (61544516).

The spelling of 51004501 in words is "fifty-one million, four thousand, five hundred one".