345471381 has 6 divisors (see below), whose sum is σ = 499014230. Its totient is φ = 230314248.

The previous prime is 345471367. The next prime is 345471383. The reversal of 345471381 is 183174543.

It is a happy number.

345471381 is a `hidden beast` number, since 34 + 547 + 1 + 3 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 220255281 + 125216100 = 14841^2 + 11190^2 .

It is not a de Polignac number, because 345471381 - 2⁹ = 345470869 is a prime.

It is a super-2 number, since 2×345471381² = 238700950180094322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345471383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19192846 + ... + 19192863.

Almost surely, 2^345471381 is an apocalyptic number.

It is an amenable number.

345471381 is a deficient number, since it is larger than the sum of its proper divisors (153542849).

345471381 is a wasteful number, since it uses less digits than its factorization.

345471381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38385715 (or 38385712 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 345471381 is about 18586.8604395686. The cubic root of 345471381 is about 701.6771898327.

The spelling of 345471381 in words is "three hundred forty-five million, four hundred seventy-one thousand, three hundred eighty-one".