51430402 has 8 divisors (see below), whose sum is σ = 77453712. Its totient is φ = 25612500.

The previous prime is 51430399. The next prime is 51430403. The reversal of 51430402 is 20403415.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51430402.

It is not an unprimeable number, because it can be changed into a prime (51430403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50724 + ... + 51727.

It is an arithmetic number, because the mean of its divisors is an integer number (9681714).

Almost surely, 2^51430402 is an apocalyptic number.

51430402 is a deficient number, since it is larger than the sum of its proper divisors (26023310).

51430402 is a wasteful number, since it uses less digits than its factorization.

51430402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102704.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 51430402 is about 7171.4992853656. The cubic root of 51430402 is about 371.8832687661.

Adding to 51430402 its reverse (20403415), we get a palindrome (71833817).

The spelling of 51430402 in words is "fifty-one million, four hundred thirty thousand, four hundred two".