51148165 has 8 divisors (see below), whose sum is σ = 61487640. Its totient is φ = 40845312.

The previous prime is 51148157. The next prime is 51148177. The reversal of 51148165 is 56184115.

It can be written as a sum of positive squares in 4 ways, for example, as 24295041 + 26853124 = 4929^2 + 5182^2 .

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 51148165 - 2³ = 51148157 is a prime.

It is a super-2 number, since 2×51148165² = 5232269565734450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5980 + ... + 11749.

It is an arithmetic number, because the mean of its divisors is an integer number (7685955).

Almost surely, 2^51148165 is an apocalyptic number.

It is an amenable number.

51148165 is a deficient number, since it is larger than the sum of its proper divisors (10339475).

51148165 is a wasteful number, since it uses less digits than its factorization.

51148165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18311.

The product of its digits is 4800, while the sum is 31.

The square root of 51148165 is about 7151.7945300463. The cubic root of 51148165 is about 371.2017535659.

The spelling of 51148165 in words is "fifty-one million, one hundred forty-eight thousand, one hundred sixty-five".