51615005151551 has 4 divisors (see below), whose sum is σ = 52489835747400. Its totient is φ = 50740174555704.

The previous prime is 51615005151529. The next prime is 51615005151583. The reversal of 51615005151551 is 15515150051615.

51615005151551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51615005151551 - 2⁴² = 47216958640447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51615005151499 and 51615005151508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51615005150551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437415297836 + ... + 437415297953.

It is an arithmetic number, because the mean of its divisors is an integer number (13122458936850).

Almost surely, 2^{51615005151551} is an apocalyptic number.

51615005151551 is a deficient number, since it is larger than the sum of its proper divisors (874830595849).

51615005151551 is an equidigital number, since it uses as much as digits as its factorization.

51615005151551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874830595848.

The product of its (nonzero) digits is 93750, while the sum is 41.

The spelling of 51615005151551 in words is "fifty-one trillion, six hundred fifteen billion, five million, one hundred fifty-one thousand, five hundred fifty-one".