51978601 has 8 divisors (see below), whose sum is σ = 52488000. Its totient is φ = 51472080.

The previous prime is 51978559. The next prime is 51978617. The reversal of 51978601 is 10687915.

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

It is a cyclic number.

It is not a de Polignac number, because 51978601 - 2⁷ = 51978473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51978671) 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 7 ways as a sum of consecutive naturals, for example, 53046 + ... + 54016.

It is an arithmetic number, because the mean of its divisors is an integer number (6561000).

Almost surely, 2^51978601 is an apocalyptic number.

It is an amenable number.

51978601 is a deficient number, since it is larger than the sum of its proper divisors (509399).

51978601 is a wasteful number, since it uses less digits than its factorization.

51978601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 51978601 is about 7209.6186445609. The cubic root of 51978601 is about 373.1999086529.

The spelling of 51978601 in words is "fifty-one million, nine hundred seventy-eight thousand, six hundred one".