51178641 has 8 divisors (see below), whose sum is σ = 68596224. Its totient is φ = 33940080.

The previous prime is 51178639. The next prime is 51178651. The reversal of 51178641 is 14687115.

It is a happy number.

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

It is not a de Polignac number, because 51178641 - 2¹ = 51178639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51178601) 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, 44086 + ... + 45231.

It is an arithmetic number, because the mean of its divisors is an integer number (8574528).

Almost surely, 2^51178641 is an apocalyptic number.

It is an amenable number.

51178641 is a deficient number, since it is larger than the sum of its proper divisors (17417583).

51178641 is a wasteful number, since it uses less digits than its factorization.

51178641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89511.

The product of its digits is 6720, while the sum is 33.

The square root of 51178641 is about 7153.9248668126. The cubic root of 51178641 is about 371.2754642489.

The spelling of 51178641 in words is "fifty-one million, one hundred seventy-eight thousand, six hundred forty-one".