51978327 has 8 divisors (see below), whose sum is σ = 69550464. Its totient is φ = 34529208.

The previous prime is 51978307. The next prime is 51978341. The reversal of 51978327 is 72387915.

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

It is not a de Polignac number, because 51978327 - 2¹² = 51974231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51978307) 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, 29763 + ... + 31460.

It is an arithmetic number, because the mean of its divisors is an integer number (8693808).

Almost surely, 2^51978327 is an apocalyptic number.

51978327 is a deficient number, since it is larger than the sum of its proper divisors (17572137).

51978327 is a wasteful number, since it uses less digits than its factorization.

51978327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61509.

The product of its digits is 105840, while the sum is 42.

The square root of 51978327 is about 7209.5996421438. The cubic root of 51978327 is about 373.1992528897.

The spelling of 51978327 in words is "fifty-one million, nine hundred seventy-eight thousand, three hundred twenty-seven".