51450819 has 16 divisors (see below), whose sum is σ = 78689280. Its totient is φ = 29292480.

The previous prime is 51450799. The next prime is 51450871. The reversal of 51450819 is 91805415.

It is not a de Polignac number, because 51450819 - 2⁷ = 51450691 is a prime.

It is a super-2 number, since 2×51450819² = 5294373551541522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51450819.

It is not an unprimeable number, because it can be changed into a prime (51450899) 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, 1542 + ... + 10260.

It is an arithmetic number, because the mean of its divisors is an integer number (4918080).

Almost surely, 2^51450819 is an apocalyptic number.

51450819 is a deficient number, since it is larger than the sum of its proper divisors (27238461).

51450819 is a wasteful number, since it uses less digits than its factorization.

51450819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 51450819 is about 7172.9226260988. The cubic root of 51450819 is about 371.9324727122.

The spelling of 51450819 in words is "fifty-one million, four hundred fifty thousand, eight hundred nineteen".