51398105 has 16 divisors (see below), whose sum is σ = 67436928. Its totient is φ = 37296000.

The previous prime is 51398071. The next prime is 51398117. The reversal of 51398105 is 50189315.

It is not a de Polignac number, because 51398105 - 2⁶ = 51398041 is a prime.

It is a super-3 number, since 3×51398105³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 33965 + ... + 35445.

It is an arithmetic number, because the mean of its divisors is an integer number (4214808).

Almost surely, 2^51398105 is an apocalyptic number.

51398105 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51398105 is a deficient number, since it is larger than the sum of its proper divisors (16038823).

51398105 is a wasteful number, since it uses less digits than its factorization.

51398105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 51398105 is about 7169.2471710773. The cubic root of 51398105 is about 371.8054080165.

The spelling of 51398105 in words is "fifty-one million, three hundred ninety-eight thousand, one hundred five".