51583321 has 6 divisors (see below), whose sum is σ = 54796430. Its totient is φ = 48548736.

The previous prime is 51583313. The next prime is 51583331. The reversal of 51583321 is 12338515.

It can be written as a sum of positive squares in 3 ways, for example, as 8497225 + 43086096 = 2915^2 + 6564^2 .

It is not a de Polignac number, because 51583321 - 2³ = 51583313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51583321.

It is not an unprimeable number, because it can be changed into a prime (51583331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88956 + ... + 89533.

Almost surely, 2^51583321 is an apocalyptic number.

It is an amenable number.

51583321 is a deficient number, since it is larger than the sum of its proper divisors (3213109).

51583321 is a wasteful number, since it uses less digits than its factorization.

51583321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178523 (or 178506 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 51583321 is about 7182.1529501954. The cubic root of 51583321 is about 372.2514799539.

The spelling of 51583321 in words is "fifty-one million, five hundred eighty-three thousand, three hundred twenty-one".