51420332 has 12 divisors (see below), whose sum is σ = 90582576. Its totient is φ = 25539600.

The previous prime is 51420331. The next prime is 51420337. The reversal of 51420332 is 23302415.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51420331) 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 3 ways as a sum of consecutive naturals, for example, 41963 + ... + 43170.

It is an arithmetic number, because the mean of its divisors is an integer number (7548548).

Almost surely, 2^51420332 is an apocalyptic number.

It is an amenable number.

51420332 is a deficient number, since it is larger than the sum of its proper divisors (39162244).

51420332 is a wasteful number, since it uses less digits than its factorization.

51420332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85288 (or 85286 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 51420332 is about 7170.7971662849. The cubic root of 51420332 is about 371.8589957757.

Adding to 51420332 its reverse (23302415), we get a palindrome (74722747).

The spelling of 51420332 in words is "fifty-one million, four hundred twenty thousand, three hundred thirty-two".