51478394 has 8 divisors (see below), whose sum is σ = 84237408. Its totient is φ = 23399260.

The previous prime is 51478381. The next prime is 51478409. The reversal of 51478394 is 49387415.

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

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169942 + ... + 1169985.

It is an arithmetic number, because the mean of its divisors is an integer number (10529676).

Almost surely, 2^51478394 is an apocalyptic number.

51478394 is a deficient number, since it is larger than the sum of its proper divisors (32759014).

51478394 is a wasteful number, since it uses less digits than its factorization.

51478394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339940.

The product of its digits is 120960, while the sum is 41.

The square root of 51478394 is about 7174.8445279323. The cubic root of 51478394 is about 371.9989064214.

The spelling of 51478394 in words is "fifty-one million, four hundred seventy-eight thousand, three hundred ninety-four".