51213541435541 has 16 divisors (see below), whose sum is σ = 53927232652800. Its totient is φ = 48501676501488.

The previous prime is 51213541435477. The next prime is 51213541435543. The reversal of 51213541435541 is 14553414531215.

It is a cyclic number.

It is not a de Polignac number, because 51213541435541 - 2⁶ = 51213541435477 is a prime.

It is a super-2 number, since 2×51213541435541² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51213541435492 and 51213541435501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51213541435543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470833030 + ... + 1470867848.

It is an arithmetic number, because the mean of its divisors is an integer number (3370452040800).

Almost surely, 2^{51213541435541} is an apocalyptic number.

It is an amenable number.

51213541435541 is a deficient number, since it is larger than the sum of its proper divisors (2713691217259).

51213541435541 is a wasteful number, since it uses less digits than its factorization.

51213541435541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58808.

The product of its digits is 720000, while the sum is 44.

Adding to 51213541435541 its reverse (14553414531215), we get a palindrome (65766955966756).

The spelling of 51213541435541 in words is "fifty-one trillion, two hundred thirteen billion, five hundred forty-one million, four hundred thirty-five thousand, five hundred forty-one".