51651105 has 16 divisors (see below), whose sum is σ = 90154944. Its totient is φ = 25042880.

The previous prime is 51651023. The next prime is 51651109. The reversal of 51651105 is 50115615.

It is not a de Polignac number, because 51651105 - 2¹² = 51647009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51651109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156354 + ... + 156683.

It is an arithmetic number, because the mean of its divisors is an integer number (5634684).

Almost surely, 2^51651105 is an apocalyptic number.

51651105 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51651105 is a deficient number, since it is larger than the sum of its proper divisors (38503839).

51651105 is a wasteful number, since it uses less digits than its factorization.

51651105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313056.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 51651105 is about 7186.8703202437. The cubic root of 51651105 is about 372.4144631909.

It can be divided in two parts, 51 and 651105, that added together give a palindrome (651156).

The spelling of 51651105 in words is "fifty-one million, six hundred fifty-one thousand, one hundred five".