51178423 has 4 divisors (see below), whose sum is σ = 51279480. Its totient is φ = 51077368.

The previous prime is 51178399. The next prime is 51178447. The reversal of 51178423 is 32487115.

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 (51178399) and next prime (51178447).

It is a cyclic number.

It is not a de Polignac number, because 51178423 - 2⁹ = 51177911 is a prime.

It is a super-3 number, since 3×51178423³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51178453) 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, 49765 + ... + 50782.

It is an arithmetic number, because the mean of its divisors is an integer number (12819870).

Almost surely, 2^51178423 is an apocalyptic number.

51178423 is a deficient number, since it is larger than the sum of its proper divisors (101057).

51178423 is a wasteful number, since it uses less digits than its factorization.

51178423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101056.

The product of its digits is 6720, while the sum is 31.

The square root of 51178423 is about 7153.9096304049. The cubic root of 51178423 is about 371.2749370878.

The spelling of 51178423 in words is "fifty-one million, one hundred seventy-eight thousand, four hundred twenty-three".