51611165 has 8 divisors (see below), whose sum is σ = 62097408. Its totient is φ = 41179600.

The previous prime is 51611159. The next prime is 51611171. The reversal of 51611165 is 56111615.

It is an interprime number because it is at equal distance from previous prime (51611159) and next prime (51611171).

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

It is not a de Polignac number, because 51611165 - 2²² = 47416861 is a prime.

It is a Duffinian number.

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, 11561 + ... + 15390.

It is an arithmetic number, because the mean of its divisors is an integer number (7762176).

Almost surely, 2^51611165 is an apocalyptic number.

It is an amenable number.

51611165 is a deficient number, since it is larger than the sum of its proper divisors (10486243).

51611165 is a wasteful number, since it uses less digits than its factorization.

51611165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27339.

The product of its digits is 900, while the sum is 26.

The square root of 51611165 is about 7184.0911046562. The cubic root of 51611165 is about 372.3184467280.

The spelling of 51611165 in words is "fifty-one million, six hundred eleven thousand, one hundred sixty-five".