51433031213 has 8 divisors (see below), whose sum is σ = 51504078360. Its totient is φ = 51362026560.

The previous prime is 51433031197. The next prime is 51433031249. The reversal of 51433031213 is 31213033415.

It can be written as a sum of positive squares in 4 ways, for example, as 28211233444 + 23221797769 = 167962^2 + 152387^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51433031213 - 2⁴ = 51433031197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51433031263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2961431 + ... + 2978747.

It is an arithmetic number, because the mean of its divisors is an integer number (6438009795).

Almost surely, 2^51433031213 is an apocalyptic number.

It is an amenable number.

51433031213 is a deficient number, since it is larger than the sum of its proper divisors (71047147).

51433031213 is a wasteful number, since it uses less digits than its factorization.

51433031213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21247.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 51433031213 its reverse (31213033415), we get a palindrome (82646064628).

The spelling of 51433031213 in words is "fifty-one billion, four hundred thirty-three million, thirty-one thousand, two hundred thirteen".