51530433 has 4 divisors (see below), whose sum is σ = 68707248. Its totient is φ = 34353620.

The previous prime is 51530429. The next prime is 51530449. The reversal of 51530433 is 33403515.

It is a happy number.

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 51530433 - 2² = 51530429 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51530473) 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, 8588403 + ... + 8588408.

It is an arithmetic number, because the mean of its divisors is an integer number (17176812).

Almost surely, 2^51530433 is an apocalyptic number.

It is an amenable number.

51530433 is a deficient number, since it is larger than the sum of its proper divisors (17176815).

51530433 is a wasteful number, since it uses less digits than its factorization.

51530433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17176814.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 51530433 is about 7178.4701016303. The cubic root of 51530433 is about 372.1242142134.

Adding to 51530433 its reverse (33403515), we get a palindrome (84933948).

The spelling of 51530433 in words is "fifty-one million, five hundred thirty thousand, four hundred thirty-three".