51521104455 has 32 divisors (see below), whose sum is σ = 82689784320. Its totient is φ = 27392722560.

The previous prime is 51521104433. The next prime is 51521104487. The reversal of 51521104455 is 55440112515.

It is a happy number.

It is not a de Polignac number, because 51521104455 - 2¹⁴ = 51521088071 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 7045341 + ... + 7052649.

It is an arithmetic number, because the mean of its divisors is an integer number (2584055760).

Almost surely, 2^51521104455 is an apocalyptic number.

51521104455 is a deficient number, since it is larger than the sum of its proper divisors (31168679865).

51521104455 is a wasteful number, since it uses less digits than its factorization.

51521104455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8711.

The product of its (nonzero) digits is 20000, while the sum is 33.

The spelling of 51521104455 in words is "fifty-one billion, five hundred twenty-one million, one hundred four thousand, four hundred fifty-five".