51511434 has 16 divisors (see below), whose sum is σ = 110947872. Its totient is φ = 15849648.

The previous prime is 51511417. The next prime is 51511459. The reversal of 51511434 is 43411515.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330124 + ... + 330279.

It is an arithmetic number, because the mean of its divisors is an integer number (6934242).

Almost surely, 2^51511434 is an apocalyptic number.

51511434 is an abundant number, since it is smaller than the sum of its proper divisors (59436438).

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

51511434 is a wasteful number, since it uses less digits than its factorization.

51511434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660421.

The product of its digits is 1200, while the sum is 24.

The square root of 51511434 is about 7177.1466475195. The cubic root of 51511434 is about 372.0784751773.

Adding to 51511434 its reverse (43411515), we get a palindrome (94922949).

The spelling of 51511434 in words is "fifty-one million, five hundred eleven thousand, four hundred thirty-four".