51066511 has 4 divisors (see below), whose sum is σ = 51231024. Its totient is φ = 50902000.

The previous prime is 51066479. The next prime is 51066527. The reversal of 51066511 is 11566015.

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

It is a cyclic number.

It is not a de Polignac number, because 51066511 - 2⁵ = 51066479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51066541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81790 + ... + 82411.

It is an arithmetic number, because the mean of its divisors is an integer number (12807756).

Almost surely, 2^51066511 is an apocalyptic number.

51066511 is a deficient number, since it is larger than the sum of its proper divisors (164513).

51066511 is a wasteful number, since it uses less digits than its factorization.

51066511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164512.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 51066511 is about 7146.0836127210. The cubic root of 51066511 is about 371.0041169446.

The spelling of 51066511 in words is "fifty-one million, sixty-six thousand, five hundred eleven".