72270281 has 8 divisors (see below), whose sum is σ = 80549280. Its totient is φ = 64438848.

The previous prime is 72270241. The next prime is 72270283. The reversal of 72270281 is 18207227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72270281 - 2¹⁰ = 72269257 is a prime.

It is a super-2 number, since 2×72270281² = 10445987031637922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72270283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111551 + ... + 112196.

It is an arithmetic number, because the mean of its divisors is an integer number (10068660).

Almost surely, 2^72270281 is an apocalyptic number.

It is an amenable number.

72270281 is a deficient number, since it is larger than the sum of its proper divisors (8278999).

72270281 is a wasteful number, since it uses less digits than its factorization.

72270281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223783.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 72270281 is about 8501.1929162912. The cubic root of 72270281 is about 416.5366767483.

The spelling of 72270281 in words is "seventy-two million, two hundred seventy thousand, two hundred eighty-one".