51430323 has 32 divisors (see below), whose sum is σ = 82308096. Its totient is φ = 27929088.

The previous prime is 51430319. The next prime is 51430349. The reversal of 51430323 is 32303415.

It is not a de Polignac number, because 51430323 - 2² = 51430319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 51430323.

It is not an unprimeable number, because it can be changed into a prime (51430363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112311 + ... + 112767.

It is an arithmetic number, because the mean of its divisors is an integer number (2572128).

Almost surely, 2^51430323 is an apocalyptic number.

51430323 is a deficient number, since it is larger than the sum of its proper divisors (30877773).

51430323 is a wasteful number, since it uses less digits than its factorization.

51430323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 51430323 is about 7171.4937774497. The cubic root of 51430323 is about 371.8830783547.

Adding to 51430323 its reverse (32303415), we get a palindrome (83733738).

The spelling of 51430323 in words is "fifty-one million, four hundred thirty thousand, three hundred twenty-three".