147221307 has 12 divisors (see below), whose sum is σ = 220529400. Its totient is φ = 98147376.

The previous prime is 147221303. The next prime is 147221339. The reversal of 147221307 is 703122741.

It is a happy number.

It is not a de Polignac number, because 147221307 - 2² = 147221303 is a prime.

It is a super-2 number, since 2×147221307² = 43348226469576498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (147221303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 302682 + ... + 303167.

It is an arithmetic number, because the mean of its divisors is an integer number (18377450).

Almost surely, 2^147221307 is an apocalyptic number.

147221307 is a deficient number, since it is larger than the sum of its proper divisors (73308093).

147221307 is an frugal number, since it uses more digits than its factorization.

147221307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605864 (or 605852 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 147221307 is about 12133.4787674434. The cubic root of 147221307 is about 528.0279233683.

The spelling of 147221307 in words is "one hundred forty-seven million, two hundred twenty-one thousand, three hundred seven".