247161312 has 72 divisors (see below), whose sum is σ = 733443984. Its totient is φ = 78802944.

The previous prime is 247161311. The next prime is 247161359. The reversal of 247161312 is 213161742.

247161312 is a `hidden beast` number, since 2 + 47 + 1 + 613 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×247161312² = 122177428299122688, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247161311) 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, 12033 + ... + 25280.

It is an arithmetic number, because the mean of its divisors is an integer number (10186722).

Almost surely, 2^247161312 is an apocalyptic number.

It is an amenable number.

247161312 is an abundant number, since it is smaller than the sum of its proper divisors (486282672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247161312 is a wasteful number, since it uses less digits than its factorization.

247161312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37352 (or 37341 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 247161312 is about 15721.3648262484. The cubic root of 247161312 is about 627.5670945120.

The spelling of 247161312 in words is "two hundred forty-seven million, one hundred sixty-one thousand, three hundred twelve".