51430413 has 4 divisors (see below), whose sum is σ = 68573888. Its totient is φ = 34286940.

The previous prime is 51430411. The next prime is 51430453. The reversal of 51430413 is 31403415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51430413 - 2¹ = 51430411 is a prime.

It is the 7172-nd Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51430413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51430411) by changing a digit.

It is a nontrivial repunit in base 7171.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8571733 + ... + 8571738.

It is an arithmetic number, because the mean of its divisors is an integer number (17143472).

Almost surely, 2^51430413 is an apocalyptic number.

It is an amenable number.

51430413 is a deficient number, since it is larger than the sum of its proper divisors (17143475).

51430413 is a wasteful number, since it uses less digits than its factorization.

51430413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17143474.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51430413 is about 7171.5000522903. The cubic root of 51430413 is about 371.8832952790.

Adding to 51430413 its reverse (31403415), we get a palindrome (82833828).

The spelling of 51430413 in words is "fifty-one million, four hundred thirty thousand, four hundred thirteen".