243087455521 has 7 divisors (see below), whose sum is σ = 246203961361. Its totient is φ = 240010399122.

The previous prime is 243087455503. The next prime is 243087455623. The reversal of 243087455521 is 125554780342.

The square root of 243087455521 is 493039.

The cubic root of 243087455521 is 6241.

It is a perfect power (a square, a cube, a 6-th power), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-243087455521 is a prime.

It is a super-2 number, since 2×243087455521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243087455021) by changing a digit.

It is a polite number, since it can be written in 6 ways as a sum of consecutive naturals, for example, 3077056360 + ... + 3077056438.

Almost surely, 2^243087455521 is an apocalyptic number.

243087455521 is the 493039-th square number.

243087455521 is the 246520-th centered octagonal number.

It is an amenable number.

243087455521 is a deficient number, since it is larger than the sum of its proper divisors (3116505840).

243087455521 is an frugal number, since it uses more digits than its factorization.

243087455521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 46.

The spelling of 243087455521 in words is "two hundred forty-three billion, eighty-seven million, four hundred fifty-five thousand, five hundred twenty-one".