51765081 has 8 divisors (see below), whose sum is σ = 69653760. Its totient is φ = 34193232.

The previous prime is 51765079. The next prime is 51765089. The reversal of 51765081 is 18056715.

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

It is not a de Polignac number, because 51765081 - 2¹ = 51765079 is a prime.

It is a super-2 number, since 2×51765081² = 5359247221873122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51765089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78825 + ... + 79478.

It is an arithmetic number, because the mean of its divisors is an integer number (8706720).

Almost surely, 2^51765081 is an apocalyptic number.

It is an amenable number.

51765081 is a deficient number, since it is larger than the sum of its proper divisors (17888679).

51765081 is a wasteful number, since it uses less digits than its factorization.

51765081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158415.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 51765081 is about 7194.7954105728. The cubic root of 51765081 is about 372.6881916211.

The spelling of 51765081 in words is "fifty-one million, seven hundred sixty-five thousand, eighty-one".