718242281 has 4 divisors (see below), whose sum is σ = 718538964. Its totient is φ = 717945600.

The previous prime is 718242271. The next prime is 718242293. The reversal of 718242281 is 182242817.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 312582400 + 405659881 = 17680^2 + 20141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-718242281 is a prime.

It is a super-2 number, since 2×718242281² = 1031743948432165922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (718242271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144680 + ... + 149561.

It is an arithmetic number, because the mean of its divisors is an integer number (179634741).

Almost surely, 2^718242281 is an apocalyptic number.

It is an amenable number.

718242281 is a deficient number, since it is larger than the sum of its proper divisors (296683).

718242281 is a wasteful number, since it uses less digits than its factorization.

718242281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296682.

The product of its digits is 14336, while the sum is 35.

The square root of 718242281 is about 26800.0425559364. The cubic root of 718242281 is about 895.5509984784.

The spelling of 718242281 in words is "seven hundred eighteen million, two hundred forty-two thousand, two hundred eighty-one".