51031361 has 8 divisors (see below), whose sum is σ = 51816000. Its totient is φ = 50252400.

The previous prime is 51031333. The next prime is 51031369. The reversal of 51031361 is 16313015.

It is a happy number.

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 51031361 - 2¹⁰ = 51030337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51031369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18830 + ... + 21368.

It is an arithmetic number, because the mean of its divisors is an integer number (6477000).

Almost surely, 2^51031361 is an apocalyptic number.

It is an amenable number.

51031361 is a deficient number, since it is larger than the sum of its proper divisors (784639).

51031361 is a wasteful number, since it uses less digits than its factorization.

51031361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 51031361 is about 7143.6238002851. The cubic root of 51031361 is about 370.9189744663.

Adding to 51031361 its reverse (16313015), we get a palindrome (67344376).

The spelling of 51031361 in words is "fifty-one million, thirty-one thousand, three hundred sixty-one".