51378324 has 24 divisors (see below), whose sum is σ = 120274560. Its totient is φ = 17070144.

The previous prime is 51378323. The next prime is 51378391. The reversal of 51378324 is 42387315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51378323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3084 + ... + 10595.

It is an arithmetic number, because the mean of its divisors is an integer number (5011440).

Almost surely, 2^51378324 is an apocalyptic number.

It is an amenable number.

51378324 is an abundant number, since it is smaller than the sum of its proper divisors (68896236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51378324 is a wasteful number, since it uses less digits than its factorization.

51378324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13999 (or 13997 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 51378324 is about 7167.8674652926. The cubic root of 51378324 is about 371.7577043999.

The spelling of 51378324 in words is "fifty-one million, three hundred seventy-eight thousand, three hundred twenty-four".