51545105 has 8 divisors (see below), whose sum is σ = 65492712. Its totient is φ = 38810368.

The previous prime is 51545101. The next prime is 51545111. The reversal of 51545105 is 50154515.

It can be written as a sum of positive squares in 4 ways, for example, as 508369 + 51036736 = 713^2 + 7144^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51545105 - 2² = 51545101 is a prime.

It is a super-2 number, since 2×51545105² = 5313795698922050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51545101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303122 + ... + 303291.

It is an arithmetic number, because the mean of its divisors is an integer number (8186589).

Almost surely, 2^51545105 is an apocalyptic number.

It is an amenable number.

51545105 is a deficient number, since it is larger than the sum of its proper divisors (13947607).

51545105 is a wasteful number, since it uses less digits than its factorization.

51545105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606435.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 51545105 is about 7179.4919736706. The cubic root of 51545105 is about 372.1595285449.

It can be divided in two parts, 5154510 and 5, that added together give a palindrome (5154515).

The spelling of 51545105 in words is "fifty-one million, five hundred forty-five thousand, one hundred five".