242892251281 has 9 divisors (see below), whose sum is σ = 256358768841. Its totient is φ = 230099577444.

The previous prime is 242892251269. The next prime is 242892251297. The reversal of 242892251281 is 182152298242.

The square root of 242892251281 is 492841.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 242892251281 - 2¹¹ = 242892249233 is a prime.

It is a super-2 number, since 2×242892251281² (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 (242892251681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9351010 + ... + 9376948.

It is an arithmetic number, because the mean of its divisors is an integer number (28484307649).

Almost surely, 2^242892251281 is an apocalyptic number.

242892251281 is the 492841-st square number.

242892251281 is the 246421-st centered octagonal number.

It is an amenable number.

242892251281 is a deficient number, since it is larger than the sum of its proper divisors (13466517560).

242892251281 is an frugal number, since it uses more digits than its factorization.

242892251281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51916 (or 25958 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The spelling of 242892251281 in words is "two hundred forty-two billion, eight hundred ninety-two million, two hundred fifty-one thousand, two hundred eighty-one".