221525040723512 has 8 divisors (see below), whose sum is σ = 415359451356600. Its totient is φ = 110762520361752.

The previous prime is 221525040723499. The next prime is 221525040723557. The reversal of 221525040723512 is 215327040525122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×221525040723512² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221525040723512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13845315045212 + ... + 13845315045227.

It is an arithmetic number, because the mean of its divisors is an integer number (51919931419575).

Almost surely, 2^{221525040723512} is an apocalyptic number.

It is an amenable number.

221525040723512 is a deficient number, since it is larger than the sum of its proper divisors (193834410633088).

221525040723512 is a wasteful number, since it uses less digits than its factorization.

221525040723512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27690630090445 (or 27690630090441 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 41.

The spelling of 221525040723512 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, forty million, seven hundred twenty-three thousand, five hundred twelve".