145466231 has 4 divisors (see below), whose sum is σ = 145714632. Its totient is φ = 145217832.

The previous prime is 145466227. The next prime is 145466257. The reversal of 145466231 is 132664541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132664541 = 739 ⋅179519.

It is a cyclic number.

It is not a de Polignac number, because 145466231 - 2² = 145466227 is a prime.

It is a super-2 number, since 2×145466231² = 42320848722690722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145466201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123320 + ... + 124493.

It is an arithmetic number, because the mean of its divisors is an integer number (36428658).

Almost surely, 2^145466231 is an apocalyptic number.

145466231 is a deficient number, since it is larger than the sum of its proper divisors (248401).

145466231 is an equidigital number, since it uses as much as digits as its factorization.

145466231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248400.

The product of its digits is 17280, while the sum is 32.

The square root of 145466231 is about 12060.9382305026. The cubic root of 145466231 is about 525.9212619543.

The spelling of 145466231 in words is "one hundred forty-five million, four hundred sixty-six thousand, two hundred thirty-one".