51420441 has 16 divisors (see below), whose sum is σ = 73535040. Its totient is φ = 31861440.

The previous prime is 51420419. The next prime is 51420443. The reversal of 51420441 is 14402415.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-51420441 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51420443) 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, 5490 + ... + 11531.

It is an arithmetic number, because the mean of its divisors is an integer number (4595940).

Almost surely, 2^51420441 is an apocalyptic number.

It is an amenable number.

51420441 is a deficient number, since it is larger than the sum of its proper divisors (22114599).

51420441 is a wasteful number, since it uses less digits than its factorization.

51420441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17096.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 51420441 is about 7170.8047665517. The cubic root of 51420441 is about 371.8592585291.

Adding to 51420441 its reverse (14402415), we get a palindrome (65822856).

The spelling of 51420441 in words is "fifty-one million, four hundred twenty thousand, four hundred forty-one".