253344681 has 6 divisors (see below), whose sum is σ = 365942330. Its totient is φ = 168896448.

The previous prime is 253344677. The next prime is 253344737. The reversal of 253344681 is 186443352.

253344681 is a `hidden beast` number, since 2 + 533 + 4 + 46 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 162333081 + 91011600 = 12741^2 + 9540^2 .

It is not a de Polignac number, because 253344681 - 2² = 253344677 is a prime.

It is a super-2 number, since 2×253344681² = 128367054781983522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253344631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14074696 + ... + 14074713.

Almost surely, 2^253344681 is an apocalyptic number.

It is an amenable number.

253344681 is a deficient number, since it is larger than the sum of its proper divisors (112597649).

253344681 is a wasteful number, since it uses less digits than its factorization.

253344681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28149415 (or 28149412 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 253344681 is about 15916.8049871826. The cubic root of 253344681 is about 632.7574447100.

The spelling of 253344681 in words is "two hundred fifty-three million, three hundred forty-four thousand, six hundred eighty-one".