51066423 has 16 divisors (see below), whose sum is σ = 75778560. Its totient is φ = 33988248.

The previous prime is 51066409. The next prime is 51066451. The reversal of 51066423 is 32466015.

51066423 is a `hidden beast` number, since 5 + 10 + 6 + 642 + 3 = 666.

It is not a de Polignac number, because 51066423 - 2⁶ = 51066359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51066403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21186 + ... + 23472.

It is an arithmetic number, because the mean of its divisors is an integer number (4736160).

Almost surely, 2^51066423 is an apocalyptic number.

51066423 is a deficient number, since it is larger than the sum of its proper divisors (24712137).

51066423 is a wasteful number, since it uses less digits than its factorization.

51066423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123 (or 3117 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 51066423 is about 7146.0774554996. The cubic root of 51066423 is about 371.0039038345.

The spelling of 51066423 in words is "fifty-one million, sixty-six thousand, four hundred twenty-three".