51230424 has 32 divisors (see below), whose sum is σ = 146373120. Its totient is φ = 14637216.

The previous prime is 51230419. The next prime is 51230429. The reversal of 51230424 is 42403215.

It is an interprime number because it is at equal distance from previous prime (51230419) and next prime (51230429).

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 51230424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51230429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152304 + ... + 152639.

It is an arithmetic number, because the mean of its divisors is an integer number (4574160).

Almost surely, 2^51230424 is an apocalyptic number.

It is an amenable number.

51230424 is an abundant number, since it is smaller than the sum of its proper divisors (95142696).

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

51230424 is a wasteful number, since it uses less digits than its factorization.

51230424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304959 (or 304955 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 51230424 is about 7157.5431539041. The cubic root of 51230424 is about 371.4006419687.

Adding to 51230424 its reverse (42403215), we get a palindrome (93633639).

The spelling of 51230424 in words is "fifty-one million, two hundred thirty thousand, four hundred twenty-four".