70273238281 has 3 divisors (see below), whose sum is σ = 70273503373. Its totient is φ = 70272973190.

The previous prime is 70273238279. The next prime is 70273238293. The reversal of 70273238281 is 18283237207.

The square root of 70273238281 is 265091.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 70273238281 - 2¹ = 70273238279 is a prime.

It is a super-2 number, since 2×70273238281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70273238201) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 132546 + ... + 397636.

Almost surely, 2^70273238281 is an apocalyptic number.

70273238281 is the 265091-st square number.

70273238281 is the 132546-th centered octagonal number.

It is an amenable number.

70273238281 is a deficient number, since it is larger than the sum of its proper divisors (265092).

70273238281 is an frugal number, since it uses more digits than its factorization.

70273238281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530182 (or 265091 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 70273238281 in words is "seventy billion, two hundred seventy-three million, two hundred thirty-eight thousand, two hundred eighty-one".