51421430 has 32 divisors (see below), whose sum is σ = 98794080. Its totient is φ = 19202560.

The previous prime is 51421427. The next prime is 51421439. The reversal of 51421430 is 3412415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421439) 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 15 ways as a sum of consecutive naturals, for example, 21116 + ... + 23424.

It is an arithmetic number, because the mean of its divisors is an integer number (3087315).

Almost surely, 2^51421430 is an apocalyptic number.

51421430 is a deficient number, since it is larger than the sum of its proper divisors (47372650).

51421430 is a wasteful number, since it uses less digits than its factorization.

51421430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51421430 is about 7170.8737264018. The cubic root of 51421430 is about 371.8616425774.

Adding to 51421430 its reverse (3412415), we get a palindrome (54833845).

The spelling of 51421430 in words is "fifty-one million, four hundred twenty-one thousand, four hundred thirty".