51162665 has 4 divisors (see below), whose sum is σ = 61395204. Its totient is φ = 40930128.

The previous prime is 51162653. The next prime is 51162677. The reversal of 51162665 is 56626115.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51162653) and next prime (51162677).

It can be written as a sum of positive squares in 2 ways, for example, as 39980329 + 11182336 = 6323^2 + 3344^2 .

It is a cyclic number.

It is not a de Polignac number, because 51162665 - 2¹⁴ = 51146281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5116262 + ... + 5116271.

It is an arithmetic number, because the mean of its divisors is an integer number (15348801).

Almost surely, 2^51162665 is an apocalyptic number.

It is an amenable number.

51162665 is a deficient number, since it is larger than the sum of its proper divisors (10232539).

51162665 is a wasteful number, since it uses less digits than its factorization.

51162665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10232538.

The product of its digits is 10800, while the sum is 32.

The square root of 51162665 is about 7152.8081897951. The cubic root of 51162665 is about 371.2368275963.

The spelling of 51162665 in words is "fifty-one million, one hundred sixty-two thousand, six hundred sixty-five".