355256681 has 8 divisors (see below), whose sum is σ = 382733064. Its totient is φ = 327801600.

The previous prime is 355256663. The next prime is 355256687. The reversal of 355256681 is 186652553.

It can be written as a sum of positive squares in 4 ways, for example, as 2418025 + 352838656 = 1555^2 + 18784^2 .

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 355256681 - 2¹⁴ = 355240297 is a prime.

It is a super-2 number, since 2×355256681² = 252414618790271522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355256687) 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, 53231 + ... + 59531.

It is an arithmetic number, because the mean of its divisors is an integer number (47841633).

Almost surely, 2^355256681 is an apocalyptic number.

It is an amenable number.

355256681 is a deficient number, since it is larger than the sum of its proper divisors (27476383).

355256681 is a wasteful number, since it uses less digits than its factorization.

355256681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10651.

The product of its digits is 216000, while the sum is 41.

The square root of 355256681 is about 18848.2540570738. The cubic root of 355256681 is about 708.2404894721.

The spelling of 355256681 in words is "three hundred fifty-five million, two hundred fifty-six thousand, six hundred eighty-one".