51255433 has 4 divisors (see below), whose sum is σ = 52095748. Its totient is φ = 50415120.

The previous prime is 51255401. The next prime is 51255439. The reversal of 51255433 is 33455215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 944784 + 50310649 = 972^2 + 7093^2 .

It is a cyclic number.

It is not a de Polignac number, because 51255433 - 2⁵ = 51255401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51255439) 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, 420066 + ... + 420187.

It is an arithmetic number, because the mean of its divisors is an integer number (13023937).

Almost surely, 2^51255433 is an apocalyptic number.

It is an amenable number.

51255433 is a deficient number, since it is larger than the sum of its proper divisors (840315).

51255433 is an equidigital number, since it uses as much as digits as its factorization.

51255433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840314.

The product of its digits is 9000, while the sum is 28.

The square root of 51255433 is about 7159.2899787619. The cubic root of 51255433 is about 371.4610673105.

It can be divided in two parts, 512 and 55433, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 51255433 in words is "fifty-one million, two hundred fifty-five thousand, four hundred thirty-three".