51555433 has 4 divisors (see below), whose sum is σ = 51871888. Its totient is φ = 51238980.

The previous prime is 51555421. The next prime is 51555437. The reversal of 51555433 is 33455515.

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 51555433 - 2¹³ = 51547241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51555395 and 51555404.

It is not an unprimeable number, because it can be changed into a prime (51555437) 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, 157983 + ... + 158308.

It is an arithmetic number, because the mean of its divisors is an integer number (12967972).

Almost surely, 2^51555433 is an apocalyptic number.

It is an amenable number.

51555433 is a deficient number, since it is larger than the sum of its proper divisors (316455).

51555433 is a wasteful number, since it uses less digits than its factorization.

51555433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316454.

The product of its digits is 22500, while the sum is 31.

The square root of 51555433 is about 7180.2112085927. The cubic root of 51555433 is about 372.1843831968.

The spelling of 51555433 in words is "fifty-one million, five hundred fifty-five thousand, four hundred thirty-three".