51135265 has 16 divisors (see below), whose sum is σ = 64385280. Its totient is φ = 38933440.

The previous prime is 51135247. The next prime is 51135281. The reversal of 51135265 is 56253115.

It is not a de Polignac number, because 51135265 - 2²¹ = 49038113 is a prime.

It is a super-2 number, since 2×51135265² = 5229630653240450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7812 + ... + 12778.

It is an arithmetic number, because the mean of its divisors is an integer number (4024080).

Almost surely, 2^51135265 is an apocalyptic number.

It is an amenable number.

51135265 is a deficient number, since it is larger than the sum of its proper divisors (13250015).

51135265 is a wasteful number, since it uses less digits than its factorization.

51135265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072.

The product of its digits is 4500, while the sum is 28.

The square root of 51135265 is about 7150.8926016267. The cubic root of 51135265 is about 371.1705442009.

The spelling of 51135265 in words is "fifty-one million, one hundred thirty-five thousand, two hundred sixty-five".