247147633421 has 8 divisors (see below), whose sum is σ = 266213811864. Its totient is φ = 228089286720.

The previous prime is 247147633399. The next prime is 247147633433. The reversal of 247147633421 is 124336741742.

247147633421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 66866719396 + 180280914025 = 258586^2 + 424595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 247147633421 - 2¹⁴ = 247147617037 is a prime.

It is a super-2 number, since 2×247147633421² (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 (247147633721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892306 + ... + 2018691.

It is an arithmetic number, because the mean of its divisors is an integer number (33276726483).

Almost surely, 2^247147633421 is an apocalyptic number.

It is an amenable number.

247147633421 is a deficient number, since it is larger than the sum of its proper divisors (19066178443).

247147633421 is a wasteful number, since it uses less digits than its factorization.

247147633421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915871.

The product of its digits is 677376, while the sum is 44.

The spelling of 247147633421 in words is "two hundred forty-seven billion, one hundred forty-seven million, six hundred thirty-three thousand, four hundred twenty-one".