247221143253 has 32 divisors (see below), whose sum is σ = 423618585600. Its totient is φ = 139567177008.

The previous prime is 247221143251. The next prime is 247221143287. The reversal of 247221143253 is 352341122742.

247221143253 is a `hidden beast` number, since 2 + 4 + 7 + 2 + 211 + 432 + 5 + 3 = 666.

It is not a de Polignac number, because 247221143253 - 2¹ = 247221143251 is a prime.

It is a super-2 number, since 2×247221143253² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247221143251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7864123 + ... + 7895496.

It is an arithmetic number, because the mean of its divisors is an integer number (13238080800).

Almost surely, 2^247221143253 is an apocalyptic number.

It is an amenable number.

247221143253 is a deficient number, since it is larger than the sum of its proper divisors (176397442347).

247221143253 is a wasteful number, since it uses less digits than its factorization.

247221143253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15759718 (or 15759712 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

Adding to 247221143253 its reverse (352341122742), we get a palindrome (599562265995).

The spelling of 247221143253 in words is "two hundred forty-seven billion, two hundred twenty-one million, one hundred forty-three thousand, two hundred fifty-three".