51321213053312 has 32 divisors (see below), whose sum is σ = 102257821060920. Its totient is φ = 25656505022464.

The previous prime is 51321213053261. The next prime is 51321213053317. The reversal of 51321213053312 is 21335031212315.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51321213053317) 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, 31238978 + ... + 32840769.

Almost surely, 2^{51321213053312} is an apocalyptic number.

It is an amenable number.

51321213053312 is a deficient number, since it is larger than the sum of its proper divisors (50936608007608).

51321213053312 is an equidigital number, since it uses as much as digits as its factorization.

51321213053312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64086018 (or 64086006 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 51321213053312 its reverse (21335031212315), we get a palindrome (72656244265627).

The spelling of 51321213053312 in words is "fifty-one trillion, three hundred twenty-one billion, two hundred thirteen million, fifty-three thousand, three hundred twelve".