247221601 has 4 divisors (see below), whose sum is σ = 269696304. Its totient is φ = 224746900.

The previous prime is 247221589. The next prime is 247221631. The reversal of 247221601 is 106122742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 247221601 - 2⁷ = 247221473 is a prime.

It is a super-2 number, since 2×247221601² = 122237040002006402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247221631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11237335 + ... + 11237356.

It is an arithmetic number, because the mean of its divisors is an integer number (67424076).

Almost surely, 2^247221601 is an apocalyptic number.

It is an amenable number.

247221601 is a deficient number, since it is larger than the sum of its proper divisors (22474703).

247221601 is a wasteful number, since it uses less digits than its factorization.

247221601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22474702.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 247221601 is about 15723.2821319214. The cubic root of 247221601 is about 627.6181169479.

The spelling of 247221601 in words is "two hundred forty-seven million, two hundred twenty-one thousand, six hundred one".