51581337 has 8 divisors (see below), whose sum is σ = 68819520. Its totient is φ = 34365360.

The previous prime is 51581323. The next prime is 51581339. The reversal of 51581337 is 73318515.

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

It is not a de Polignac number, because 51581337 - 2⁶ = 51581273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51581298 and 51581307.

It is not an unprimeable number, because it can be changed into a prime (51581339) 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, 964 + ... + 10202.

It is an arithmetic number, because the mean of its divisors is an integer number (8602440).

Almost surely, 2^51581337 is an apocalyptic number.

It is an amenable number.

51581337 is a deficient number, since it is larger than the sum of its proper divisors (17238183).

51581337 is a wasteful number, since it uses less digits than its factorization.

51581337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11103.

The product of its digits is 12600, while the sum is 33.

The square root of 51581337 is about 7182.0148287232. The cubic root of 51581337 is about 372.2467073751.

The spelling of 51581337 in words is "fifty-one million, five hundred eighty-one thousand, three hundred thirty-seven".