51312033 has 24 divisors (see below), whose sum is σ = 76372296. Its totient is φ = 33177600.

The previous prime is 51312031. The next prime is 51312047. The reversal of 51312033 is 33021315.

51312033 is a `hidden beast` number, since 513 + 120 + 33 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 16064064 + 35247969 = 4008^2 + 5937^2 .

It is not a de Polignac number, because 51312033 - 2¹ = 51312031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51311997 and 51312015.

It is not an unprimeable number, because it can be changed into a prime (51312031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88641 + ... + 89217.

It is an arithmetic number, because the mean of its divisors is an integer number (3182179).

Almost surely, 2^51312033 is an apocalyptic number.

It is an amenable number.

51312033 is a deficient number, since it is larger than the sum of its proper divisors (25060263).

51312033 is a wasteful number, since it uses less digits than its factorization.

51312033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 51312033 is about 7163.2417940483. The cubic root of 51312033 is about 371.5977485097.

Adding to 51312033 its reverse (33021315), we get a palindrome (84333348).

It can be divided in two parts, 5131203 and 3, that added together give a triangular number (5131206 = T₃₂₀₃).

The spelling of 51312033 in words is "fifty-one million, three hundred twelve thousand, thirty-three".