51415511212 has 48 divisors (see below), whose sum is σ = 103506524352. Its totient is φ = 22136647680.

The previous prime is 51415511201. The next prime is 51415511221. The reversal of 51415511212 is 21211551415.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157464 + ... + 357247.

It is an arithmetic number, because the mean of its divisors is an integer number (2156385924).

Almost surely, 2^51415511212 is an apocalyptic number.

51415511212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51415511212 is an abundant number, since it is smaller than the sum of its proper divisors (52091013140).

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

51415511212 is a wasteful number, since it uses less digits than its factorization.

51415511212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514858 (or 514856 counting only the distinct ones).

The product of its digits is 2000, while the sum is 28.

The spelling of 51415511212 in words is "fifty-one billion, four hundred fifteen million, five hundred eleven thousand, two hundred twelve".