51133321 has 8 divisors (see below), whose sum is σ = 53437824. Its totient is φ = 48879600.

The previous prime is 51133307. The next prime is 51133343. The reversal of 51133321 is 12333115.

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 51133321 - 2⁷ = 51133193 is a prime.

It is a super-2 number, since 2×51133321² = 5229233032978082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51133391) 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, 10630 + ... + 14671.

It is an arithmetic number, because the mean of its divisors is an integer number (6679728).

Almost surely, 2^51133321 is an apocalyptic number.

It is an amenable number.

51133321 is a deficient number, since it is larger than the sum of its proper divisors (2304503).

51133321 is a wasteful number, since it uses less digits than its factorization.

51133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25391.

The product of its digits is 270, while the sum is 19.

The square root of 51133321 is about 7150.7566732479. The cubic root of 51133321 is about 371.1658405671.

Adding to 51133321 its reverse (12333115), we get a palindrome (63466436).

The spelling of 51133321 in words is "fifty-one million, one hundred thirty-three thousand, three hundred twenty-one".