247149220 has 12 divisors (see below), whose sum is σ = 519013404. Its totient is φ = 98859680.

The previous prime is 247149187. The next prime is 247149241. The reversal of 247149220 is 22941742.

It can be written as a sum of positive squares in 2 ways, for example, as 167547136 + 79602084 = 12944^2 + 8922^2 .

It is a super-2 number, since 2×247149220² = 122165473893216800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6178711 + ... + 6178750.

It is an arithmetic number, because the mean of its divisors is an integer number (43251117).

Almost surely, 2^247149220 is an apocalyptic number.

247149220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247149220 is an abundant number, since it is smaller than the sum of its proper divisors (271864184).

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

247149220 is a wasteful number, since it uses less digits than its factorization.

247149220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12357470 (or 12357468 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 247149220 is about 15720.9802493356. The cubic root of 247149220 is about 627.5568600825.

The spelling of 247149220 in words is "two hundred forty-seven million, one hundred forty-nine thousand, two hundred twenty".