51081046 has 4 divisors (see below), whose sum is σ = 76621572. Its totient is φ = 25540522.

The previous prime is 51081031. The next prime is 51081047. The reversal of 51081046 is 64018015.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51081046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51081047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770260 + ... + 12770263.

It is an arithmetic number, because the mean of its divisors is an integer number (19155393).

Almost surely, 2^51081046 is an apocalyptic number.

51081046 is a deficient number, since it is larger than the sum of its proper divisors (25540526).

51081046 is a wasteful number, since it uses less digits than its factorization.

51081046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25540525.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 51081046 is about 7147.1005309846. The cubic root of 51081046 is about 371.0393130917.

The spelling of 51081046 in words is "fifty-one million, eighty-one thousand, forty-six".