355497381 has 12 divisors (see below), whose sum is σ = 516079200. Its totient is φ = 235806120.

The previous prime is 355497349. The next prime is 355497397. The reversal of 355497381 is 183794553.

355497381 is a `hidden beast` number, since 3 + 554 + 97 + 3 + 8 + 1 = 666.

It is not a de Polignac number, because 355497381 - 2⁵ = 355497349 is a prime.

It is a super-2 number, since 2×355497381² = 252756775795718322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355497301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97455 + ... + 101036.

It is an arithmetic number, because the mean of its divisors is an integer number (43006600).

Almost surely, 2^355497381 is an apocalyptic number.

It is an amenable number.

355497381 is a deficient number, since it is larger than the sum of its proper divisors (160581819).

355497381 is a wasteful number, since it uses less digits than its factorization.

355497381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198696 (or 198693 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 355497381 is about 18854.6381826860. The cubic root of 355497381 is about 708.4004067081.

The spelling of 355497381 in words is "three hundred fifty-five million, four hundred ninety-seven thousand, three hundred eighty-one".