247221052 has 24 divisors (see below), whose sum is σ = 467714016. Its totient is φ = 113661888.

The previous prime is 247221049. The next prime is 247221071. The reversal of 247221052 is 250122742.

247221052 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247221052² = 122236497103973408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4638 + ... + 22714.

It is an arithmetic number, because the mean of its divisors is an integer number (19488084).

Almost surely, 2^247221052 is an apocalyptic number.

It is an amenable number.

247221052 is a deficient number, since it is larger than the sum of its proper divisors (220492964).

247221052 is a wasteful number, since it uses less digits than its factorization.

247221052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18357 (or 18355 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 247221052 is about 15723.2646737247. The cubic root of 247221052 is about 627.6176523680.

Adding to 247221052 its reverse (250122742), we get a palindrome (497343794).

The spelling of 247221052 in words is "two hundred forty-seven million, two hundred twenty-one thousand, fifty-two".