51255213505133 has 4 divisors (see below), whose sum is σ = 55914778369248. Its totient is φ = 46595648641020.

The previous prime is 51255213505109. The next prime is 51255213505211. The reversal of 51255213505133 is 33150531255215.

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 not a de Polignac number, because 51255213505133 - 2⁴⁰ = 50155701877357 is a prime.

It is a super-2 number, since 2×51255213505133² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51255213501133) 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, 2329782432041 + ... + 2329782432062.

It is an arithmetic number, because the mean of its divisors is an integer number (13978694592312).

Almost surely, 2^{51255213505133} is an apocalyptic number.

It is an amenable number.

51255213505133 is a deficient number, since it is larger than the sum of its proper divisors (4659564864115).

51255213505133 is a wasteful number, since it uses less digits than its factorization.

51255213505133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659564864114.

The product of its (nonzero) digits is 337500, while the sum is 41.

The spelling of 51255213505133 in words is "fifty-one trillion, two hundred fifty-five billion, two hundred thirteen million, five hundred five thousand, one hundred thirty-three".