51101365 has 12 divisors (see below), whose sum is σ = 71333676. Its totient is φ = 35040768.

The previous prime is 51101363. The next prime is 51101417. The reversal of 51101365 is 56310115.

It can be written as a sum of positive squares in 2 ways, for example, as 14607684 + 36493681 = 3822^2 + 6041^2 .

It is not a de Polignac number, because 51101365 - 2¹ = 51101363 is a prime.

It is a super-2 number, since 2×51101365² = 5222699009726450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104044 + ... + 104533.

It is an arithmetic number, because the mean of its divisors is an integer number (5944473).

Almost surely, 2^51101365 is an apocalyptic number.

It is an amenable number.

51101365 is a deficient number, since it is larger than the sum of its proper divisors (20232311).

51101365 is a wasteful number, since it uses less digits than its factorization.

51101365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208596 (or 208589 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 51101365 is about 7148.5218751851. The cubic root of 51101365 is about 371.0885038645.

It can be divided in two parts, 51 and 101365, that multiplied together give a palindrome (5169615).

The spelling of 51101365 in words is "fifty-one million, one hundred one thousand, three hundred sixty-five".