51451601 has 4 divisors (see below), whose sum is σ = 54159600. Its totient is φ = 48743604.

The previous prime is 51451577. The next prime is 51451619. The reversal of 51451601 is 10615415.

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: 10615415 = 5 ⋅2123083.

It is a cyclic number.

It is not a de Polignac number, because 51451601 - 2¹⁰ = 51450577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51451501) 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, 1353971 + ... + 1354008.

It is an arithmetic number, because the mean of its divisors is an integer number (13539900).

Almost surely, 2^51451601 is an apocalyptic number.

It is an amenable number.

51451601 is a deficient number, since it is larger than the sum of its proper divisors (2707999).

51451601 is a wasteful number, since it uses less digits than its factorization.

51451601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707998.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 51451601 is about 7172.9771364476. The cubic root of 51451601 is about 371.9343570341.

The spelling of 51451601 in words is "fifty-one million, four hundred fifty-one thousand, six hundred one".