51530289 has 4 divisors (see below), whose sum is σ = 68707056. Its totient is φ = 34353524.

The previous prime is 51530287. The next prime is 51530293. The reversal of 51530289 is 98203515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51530289 - 2¹ = 51530287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51530287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8588379 + ... + 8588384.

It is an arithmetic number, because the mean of its divisors is an integer number (17176764).

Almost surely, 2^51530289 is an apocalyptic number.

It is an amenable number.

51530289 is a deficient number, since it is larger than the sum of its proper divisors (17176767).

51530289 is a wasteful number, since it uses less digits than its factorization.

51530289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17176766.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 51530289 is about 7178.4600716310. The cubic root of 51530289 is about 372.1238675837.

The spelling of 51530289 in words is "fifty-one million, five hundred thirty thousand, two hundred eighty-nine".