51401333001521 has 4 divisors (see below), whose sum is σ = 51401624934000. Its totient is φ = 51401041069044.

The previous prime is 51401333001437. The next prime is 51401333001541. The reversal of 51401333001521 is 12510033310415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51401333001521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51401333001541) 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, 145701971 + ... + 146054328.

It is an arithmetic number, because the mean of its divisors is an integer number (12850406233500).

Almost surely, 2^{51401333001521} is an apocalyptic number.

It is an amenable number.

51401333001521 is a deficient number, since it is larger than the sum of its proper divisors (291932479).

51401333001521 is a wasteful number, since it uses less digits than its factorization.

51401333001521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291932478.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 51401333001521 its reverse (12510033310415), we get a palindrome (63911366311936).

The spelling of 51401333001521 in words is "fifty-one trillion, four hundred one billion, three hundred thirty-three million, one thousand, five hundred twenty-one".