51115430 has 48 divisors (see below), whose sum is σ = 102120480. Its totient is φ = 18382848.

The previous prime is 51115423. The next prime is 51115457. The reversal of 51115430 is 3451115.

It is a super-2 number, since 2×51115430² = 5225574368169800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66086 + ... + 66854.

It is an arithmetic number, because the mean of its divisors is an integer number (2127510).

Almost surely, 2^51115430 is an apocalyptic number.

51115430 is a deficient number, since it is larger than the sum of its proper divisors (51005050).

51115430 is a wasteful number, since it uses less digits than its factorization.

51115430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 51115430 is about 7149.5055773109. The cubic root of 51115430 is about 371.1225465365.

Adding to 51115430 its reverse (3451115), we get a palindrome (54566545).

The spelling of 51115430 in words is "fifty-one million, one hundred fifteen thousand, four hundred thirty".