147218621 has 8 divisors (see below), whose sum is σ = 162162624. Its totient is φ = 132534720.

The previous prime is 147218557. The next prime is 147218719. The reversal of 147218621 is 126812741.

It is a happy number.

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 147218621 - 2⁶ = 147218557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147217621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63836 + ... + 66101.

It is an arithmetic number, because the mean of its divisors is an integer number (20270328).

Almost surely, 2^147218621 is an apocalyptic number.

147218621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

147218621 is a deficient number, since it is larger than the sum of its proper divisors (14944003).

147218621 is a wasteful number, since it uses less digits than its factorization.

147218621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130051.

The product of its digits is 5376, while the sum is 32.

The square root of 147218621 is about 12133.3680814521. The cubic root of 147218621 is about 528.0247121220.

The spelling of 147218621 in words is "one hundred forty-seven million, two hundred eighteen thousand, six hundred twenty-one".