345812247 has 20 divisors (see below), whose sum is σ = 563547336. Its totient is φ = 209582640.

The previous prime is 345812239. The next prime is 345812263. The reversal of 345812247 is 742218543.

It is a happy number.

345812247 is a `hidden beast` number, since 34 + 581 + 2 + 2 + 47 = 666.

It is not a de Polignac number, because 345812247 - 2³ = 345812239 is a prime.

It is a super-2 number, since 2×345812247² = 239172220350378018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345812267) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 193168 + ... + 194949.

Almost surely, 2^345812247 is an apocalyptic number.

345812247 is a deficient number, since it is larger than the sum of its proper divisors (217735089).

345812247 is a wasteful number, since it uses less digits than its factorization.

345812247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388140 (or 388131 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 345812247 is about 18596.0277209946. The cubic root of 345812247 is about 701.9078884183.

The spelling of 345812247 in words is "three hundred forty-five million, eight hundred twelve thousand, two hundred forty-seven".