51450081 has 12 divisors (see below), whose sum is σ = 72402192. Its totient is φ = 32494104.

The previous prime is 51450073. The next prime is 51450083. The reversal of 51450081 is 18005415.

It is not a de Polignac number, because 51450081 - 2³ = 51450073 is a prime.

It is a super-2 number, since 2×51450081² = 5294221669813122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51450083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22671 + ... + 24836.

It is an arithmetic number, because the mean of its divisors is an integer number (6033516).

Almost surely, 2^51450081 is an apocalyptic number.

It is an amenable number.

51450081 is a deficient number, since it is larger than the sum of its proper divisors (20952111).

51450081 is a wasteful number, since it uses less digits than its factorization.

51450081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47548 (or 47529 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 51450081 is about 7172.8711824485. The cubic root of 51450081 is about 371.9306943960.

Adding to 51450081 its reverse (18005415), we get a palindrome (69455496).

The spelling of 51450081 in words is "fifty-one million, four hundred fifty thousand, eighty-one".