51260321 has 32 divisors (see below), whose sum is σ = 64800000. Its totient is φ = 40379136.

The previous prime is 51260317. The next prime is 51260327. The reversal of 51260321 is 12306215.

It is not a de Polignac number, because 51260321 - 2² = 51260317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51260293 and 51260302.

It is not an unprimeable number, because it can be changed into a prime (51260327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 343955 + ... + 344103.

It is an arithmetic number, because the mean of its divisors is an integer number (2025000).

Almost surely, 2^51260321 is an apocalyptic number.

It is an amenable number.

51260321 is a deficient number, since it is larger than the sum of its proper divisors (13539679).

51260321 is a wasteful number, since it uses less digits than its factorization.

51260321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 51260321 is about 7159.6313452579. The cubic root of 51260321 is about 371.4728751253.

Adding to 51260321 its reverse (12306215), we get a palindrome (63566536).

The spelling of 51260321 in words is "fifty-one million, two hundred sixty thousand, three hundred twenty-one".