51333245136013 has 4 divisors (see below), whose sum is σ = 51334194943900. Its totient is φ = 51332295328128.

The previous prime is 51333245136001. The next prime is 51333245136023. The reversal of 51333245136013 is 31063154233315.

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 38428927597449 + 12904317538564 = 6199107^2 + 3592258^2 .

It is a cyclic number.

It is not a de Polignac number, because 51333245136013 - 2¹³ = 51333245127821 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 (51333245136023) 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, 474822870 + ... + 474930967.

It is an arithmetic number, because the mean of its divisors is an integer number (12833548735975).

Almost surely, 2^{51333245136013} is an apocalyptic number.

It is an amenable number.

51333245136013 is a deficient number, since it is larger than the sum of its proper divisors (949807887).

51333245136013 is an equidigital number, since it uses as much as digits as its factorization.

51333245136013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949807886.

The product of its (nonzero) digits is 291600, while the sum is 40.

Adding to 51333245136013 its reverse (31063154233315), we get a palindrome (82396399369328).

The spelling of 51333245136013 in words is "fifty-one trillion, three hundred thirty-three billion, two hundred forty-five million, one hundred thirty-six thousand, thirteen".