247181229 has 6 divisors (see below), whose sum is σ = 357039566. Its totient is φ = 164787480.

The previous prime is 247181191. The next prime is 247181237. The reversal of 247181229 is 922181742.

It can be written as a sum of positive squares in only one way, i.e., 126225225 + 120956004 = 11235^2 + 10998^2 .

It is not a de Polignac number, because 247181229 - 2⁷ = 247181101 is a prime.

It is a super-2 number, since 2×247181229² = 122197119939900882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 247181193 and 247181202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247181269) 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, 13732282 + ... + 13732299.

Almost surely, 2^247181229 is an apocalyptic number.

It is an amenable number.

247181229 is a deficient number, since it is larger than the sum of its proper divisors (109858337).

247181229 is a wasteful number, since it uses less digits than its factorization.

247181229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27464587 (or 27464584 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 247181229 is about 15721.9982508586. The cubic root of 247181229 is about 627.5839511389.

It can be divided in two parts, 247 and 181229, that added together give a square (181476 = 426²).

The spelling of 247181229 in words is "two hundred forty-seven million, one hundred eighty-one thousand, two hundred twenty-nine".