51512430 has 16 divisors (see below), whose sum is σ = 123629904. Its totient is φ = 13736640.

The previous prime is 51512413. The next prime is 51512437. The reversal of 51512430 is 3421515.

It is a junction number, because it is equal to n+sod(n) for n = 51512397 and 51512406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512437) 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, 858511 + ... + 858570.

It is an arithmetic number, because the mean of its divisors is an integer number (7726869).

Almost surely, 2^51512430 is an apocalyptic number.

51512430 is an abundant number, since it is smaller than the sum of its proper divisors (72117474).

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

51512430 is a wasteful number, since it uses less digits than its factorization.

51512430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717091.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51512430 is about 7177.2160340901. The cubic root of 51512430 is about 372.0808732712.

Adding to 51512430 its reverse (3421515), we get a palindrome (54933945).

The spelling of 51512430 in words is "fifty-one million, five hundred twelve thousand, four hundred thirty".