54131115122551 has 4 divisors (see below), whose sum is σ = 57315298365072. Its totient is φ = 50946931880032.

The previous prime is 54131115122549. The next prime is 54131115122561. The reversal of 54131115122551 is 15522151113145.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54131115122551 - 2¹ = 54131115122549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54131115122551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54131115122561) 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, 1592091621235 + ... + 1592091621268.

It is an arithmetic number, because the mean of its divisors is an integer number (14328824591268).

Almost surely, 2^{54131115122551} is an apocalyptic number.

54131115122551 is a deficient number, since it is larger than the sum of its proper divisors (3184183242521).

54131115122551 is a wasteful number, since it uses less digits than its factorization.

54131115122551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184183242520.

The product of its digits is 30000, while the sum is 37.

Adding to 54131115122551 its reverse (15522151113145), we get a palindrome (69653266235696).

The spelling of 54131115122551 in words is "fifty-four trillion, one hundred thirty-one billion, one hundred fifteen million, one hundred twenty-two thousand, five hundred fifty-one".