51535303203213 has 12 divisors (see below), whose sum is σ = 74491114276540. Its totient is φ = 34333223322816.

The previous prime is 51535303203211. The next prime is 51535303203227. The reversal of 51535303203213 is 31230230353515.

It is a happy number.

51535303203213 is a `hidden beast` number, since 5 + 1 + 5 + 3 + 5 + 3 + 0 + 320 + 321 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49714090875684 + 1821212327529 = 7050822^2 + 1349523^2 .

It is not a de Polignac number, because 51535303203213 - 2¹ = 51535303203211 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 (51535303203211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1970442808 + ... + 1970468961.

Almost surely, 2^{51535303203213} is an apocalyptic number.

It is an amenable number.

51535303203213 is a deficient number, since it is larger than the sum of its proper divisors (22955811073327).

51535303203213 is a wasteful number, since it uses less digits than its factorization.

51535303203213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940913228 (or 3940913225 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 36.

Adding to 51535303203213 its reverse (31230230353515), we get a palindrome (82765533556728).

The spelling of 51535303203213 in words is "fifty-one trillion, five hundred thirty-five billion, three hundred three million, two hundred three thousand, two hundred thirteen".