216531370743472 has 80 divisors (see below), whose sum is σ = 436678058037760. Its totient is φ = 103929786374400.

The previous prime is 216531370743469. The next prime is 216531370743599. The reversal of 216531370743472 is 274347073135612.

It is a super-2 number, since 2×216531370743472² (a number of 29 digits) contains 22 as substring.

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, 49566979 + ... + 53758237.

It is an arithmetic number, because the mean of its divisors is an integer number (5458475725472).

Almost surely, 2^{216531370743472} is an apocalyptic number.

It is an amenable number.

216531370743472 is an abundant number, since it is smaller than the sum of its proper divisors (220146687294288).

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

216531370743472 is a wasteful number, since it uses less digits than its factorization.

216531370743472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192602 (or 4192596 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 55.

The spelling of 216531370743472 in words is "two hundred sixteen trillion, five hundred thirty-one billion, three hundred seventy million, seven hundred forty-three thousand, four hundred seventy-two".