247224747 has 48 divisors (see below), whose sum is σ = 427341312. Its totient is φ = 125657280.

The previous prime is 247224743. The next prime is 247224749. The reversal of 247224747 is 747422742.

It is not a de Polignac number, because 247224747 - 2² = 247224743 is a prime.

It is a super-2 number, since 2×247224747² = 122240151058428018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247224743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74373 + ... + 77625.

It is an arithmetic number, because the mean of its divisors is an integer number (8902944).

Almost surely, 2^247224747 is an apocalyptic number.

247224747 is a deficient number, since it is larger than the sum of its proper divisors (180116565).

247224747 is a wasteful number, since it uses less digits than its factorization.

247224747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328 (or 3321 counting only the distinct ones).

The product of its digits is 175616, while the sum is 39.

The square root of 247224747 is about 15723.3821743288. The cubic root of 247224747 is about 627.6207791724.

The spelling of 247224747 in words is "two hundred forty-seven million, two hundred twenty-four thousand, seven hundred forty-seven".