247355385 has 8 divisors (see below), whose sum is σ = 395768640. Its totient is φ = 131922864.

The previous prime is 247355377. The next prime is 247355387. The reversal of 247355385 is 583553742.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 247355385 - 2³ = 247355377 is a prime.

It is a super-2 number, since 2×247355385² = 122369372976996450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247355387) 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, 8245165 + ... + 8245194.

It is an arithmetic number, because the mean of its divisors is an integer number (49471080).

Almost surely, 2^247355385 is an apocalyptic number.

It is an amenable number.

247355385 is a deficient number, since it is larger than the sum of its proper divisors (148413255).

247355385 is a wasteful number, since it uses less digits than its factorization.

247355385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16490367.

The product of its digits is 504000, while the sum is 42.

The square root of 247355385 is about 15727.5358845561. The cubic root of 247355385 is about 627.7313084064.

The spelling of 247355385 in words is "two hundred forty-seven million, three hundred fifty-five thousand, three hundred eighty-five".