51540212216 has 32 divisors (see below), whose sum is σ = 100913484960. Its totient is φ = 24631592832.

The previous prime is 51540212203. The next prime is 51540212219. The reversal of 51540212216 is 61221204515.

It is a super-3 number, since 3×51540212216³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51540212219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150626 + ... + 354638.

It is an arithmetic number, because the mean of its divisors is an integer number (3153546405).

Almost surely, 2^51540212216 is an apocalyptic number.

It is an amenable number.

51540212216 is a deficient number, since it is larger than the sum of its proper divisors (49373272744).

51540212216 is a wasteful number, since it uses less digits than its factorization.

51540212216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205415 (or 205411 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 51540212216 in words is "fifty-one billion, five hundred forty million, two hundred twelve thousand, two hundred sixteen".