51375278 has 8 divisors (see below), whose sum is σ = 81118920. Its totient is φ = 24335640.

The previous prime is 51375271. The next prime is 51375281. The reversal of 51375278 is 87257315.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 1351981 = 51375278 / (5 + 1 + 3 + 7 + 5 + 2 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51375271) 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, 675953 + ... + 676028.

It is an arithmetic number, because the mean of its divisors is an integer number (10139865).

Almost surely, 2^51375278 is an apocalyptic number.

51375278 is a deficient number, since it is larger than the sum of its proper divisors (29743642).

51375278 is a wasteful number, since it uses less digits than its factorization.

51375278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352002.

The product of its digits is 58800, while the sum is 38.

The square root of 51375278 is about 7167.6549861164. The cubic root of 51375278 is about 371.7503576159.

The spelling of 51375278 in words is "fifty-one million, three hundred seventy-five thousand, two hundred seventy-eight".