51340161 has 8 divisors (see below), whose sum is σ = 68571360. Its totient is φ = 34167872.

The previous prime is 51340141. The next prime is 51340169. The reversal of 51340161 is 16104315.

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

It is a cyclic number.

It is not a de Polignac number, because 51340161 - 2⁵ = 51340129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51340169) 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, 12651 + ... + 16208.

It is an arithmetic number, because the mean of its divisors is an integer number (8571420).

Almost surely, 2^51340161 is an apocalyptic number.

It is an amenable number.

51340161 is a deficient number, since it is larger than the sum of its proper divisors (17231199).

51340161 is a wasteful number, since it uses less digits than its factorization.

51340161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29455.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 51340161 is about 7165.2048819277. The cubic root of 51340161 is about 371.6656363685.

Adding to 51340161 its reverse (16104315), we get a palindrome (67444476).

The spelling of 51340161 in words is "fifty-one million, three hundred forty thousand, one hundred sixty-one".