148221505 has 4 divisors (see below), whose sum is σ = 177865812. Its totient is φ = 118577200.

The previous prime is 148221481. The next prime is 148221547. The reversal of 148221505 is 505122841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43507216 + 104714289 = 6596^2 + 10233^2 .

It is not a de Polignac number, because 148221505 - 2⁷ = 148221377 is a prime.

It is a super-2 number, since 2×148221505² = 43939229088930050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14822146 + ... + 14822155.

It is an arithmetic number, because the mean of its divisors is an integer number (44466453).

Almost surely, 2^148221505 is an apocalyptic number.

It is an amenable number.

148221505 is a deficient number, since it is larger than the sum of its proper divisors (29644307).

148221505 is an equidigital number, since it uses as much as digits as its factorization.

148221505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29644306.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 148221505 is about 12174.6254562512. The cubic root of 148221505 is about 529.2210046363.

The spelling of 148221505 in words is "one hundred forty-eight million, two hundred twenty-one thousand, five hundred five".