51521447886 has 32 divisors (see below), whose sum is σ = 103486602240. Its totient is φ = 17100025536.

The previous prime is 51521447833. The next prime is 51521447891. The reversal of 51521447886 is 68874412515.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1293805 + ... + 1333031.

It is an arithmetic number, because the mean of its divisors is an integer number (3233956320).

Almost surely, 2^51521447886 is an apocalyptic number.

51521447886 is an abundant number, since it is smaller than the sum of its proper divisors (51965154354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51521447886 is a wasteful number, since it uses less digits than its factorization.

51521447886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40168.

The product of its digits is 2150400, while the sum is 51.

The spelling of 51521447886 in words is "fifty-one billion, five hundred twenty-one million, four hundred forty-seven thousand, eight hundred eighty-six".