145531227 has 8 divisors (see below), whose sum is σ = 194475600. Its totient is φ = 96803840.

The previous prime is 145531219. The next prime is 145531247. The reversal of 145531227 is 722135541.

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 145531227 - 2³ = 145531219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145531194 and 145531203.

It is not an unprimeable number, because it can be changed into a prime (145531247) 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, 52674 + ... + 55367.

It is an arithmetic number, because the mean of its divisors is an integer number (24309450).

Almost surely, 2^145531227 is an apocalyptic number.

145531227 is a deficient number, since it is larger than the sum of its proper divisors (48944373).

145531227 is a wasteful number, since it uses less digits than its factorization.

145531227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108493.

The product of its digits is 8400, while the sum is 30.

The square root of 145531227 is about 12063.6324131664. The cubic root of 145531227 is about 525.9995795319. Note that the first 3 decimals are identical.

Adding to 145531227 its reverse (722135541), we get a palindrome (867666768).

The spelling of 145531227 in words is "one hundred forty-five million, five hundred thirty-one thousand, two hundred twenty-seven".