148809221 has 8 divisors (see below), whose sum is σ = 162437088. Its totient is φ = 135198000.

The previous prime is 148809217. The next prime is 148809223. The reversal of 148809221 is 122908841.

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 148809221 - 2² = 148809217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148809223) 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, 21386 + ... + 27476.

It is an arithmetic number, because the mean of its divisors is an integer number (20304636).

Almost surely, 2^148809221 is an apocalyptic number.

148809221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

148809221 is the 6521-st centered heptagonal number.

It is an amenable number.

148809221 is a deficient number, since it is larger than the sum of its proper divisors (13627867).

148809221 is a wasteful number, since it uses less digits than its factorization.

148809221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 148809221 is about 12198.7385003532. The cubic root of 148809221 is about 529.9195570328.

The spelling of 148809221 in words is "one hundred forty-eight million, eight hundred nine thousand, two hundred twenty-one".