51390294 has 8 divisors (see below), whose sum is σ = 102780600. Its totient is φ = 17130096.

The previous prime is 51390293. The next prime is 51390301. The reversal of 51390294 is 49209315.

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

51390294 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51390293) 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 3 ways as a sum of consecutive naturals, for example, 4282519 + ... + 4282530.

It is an arithmetic number, because the mean of its divisors is an integer number (12847575).

Almost surely, 2^51390294 is an apocalyptic number.

51390294 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51390294 is a wasteful number, since it uses less digits than its factorization.

51390294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8565054.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 51390294 is about 7168.7023930416. The cubic root of 51390294 is about 371.7865725674.

The spelling of 51390294 in words is "fifty-one million, three hundred ninety thousand, two hundred ninety-four".