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148231 = 227653
BaseRepresentation
bin100100001100000111
321112100001
4210030013
514220411
63102131
71155106
oct441407
9245301
10148231
11a1406
1271947
1352615
143c03d
152ddc1
hex24307

148231 has 4 divisors (see below), whose sum is σ = 149112. Its totient is φ = 147352.

The previous prime is 148229. The next prime is 148243. The reversal of 148231 is 132841.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 132841 = 711871.

It is a cyclic number.

It is not a de Polignac number, because 148231 - 21 = 148229 is a prime.

It is a super-2 number, since 2×1482312 = 43944858722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 148199 and 148208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100 + ... + 553.

It is an arithmetic number, because the mean of its divisors is an integer number (37278).

2148231 is an apocalyptic number.

148231 is the 244-th centered pentagonal number.

148231 is a deficient number, since it is larger than the sum of its proper divisors (881).

148231 is an equidigital number, since it uses as much as digits as its factorization.

148231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its digits is 192, while the sum is 19.

The square root of 148231 is about 385.0077921289. The cubic root of 148231 is about 52.9232304945.

The spelling of 148231 in words is "one hundred forty-eight thousand, two hundred thirty-one".

Divisors: 1 227 653 148231