51545430 has 32 divisors (see below), whose sum is σ = 137455200. Its totient is φ = 13745376.

The previous prime is 51545419. The next prime is 51545437. The reversal of 51545430 is 3454515.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51545394 and 51545403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51545437) 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, 95185 + ... + 95724.

It is an arithmetic number, because the mean of its divisors is an integer number (4295475).

Almost surely, 2^51545430 is an apocalyptic number.

51545430 is an abundant number, since it is smaller than the sum of its proper divisors (85909770).

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

51545430 is a wasteful number, since it uses less digits than its factorization.

51545430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190925 (or 190919 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 51545430 is about 7179.5146075483. The cubic root of 51545430 is about 372.1603107180.

Adding to 51545430 its reverse (3454515), we get a palindrome (54999945).

The spelling of 51545430 in words is "fifty-one million, five hundred forty-five thousand, four hundred thirty".