145908231 has 24 divisors (see below), whose sum is σ = 227372544. Its totient is φ = 82983600.

The previous prime is 145908223. The next prime is 145908271. The reversal of 145908231 is 132809541.

It is not a de Polignac number, because 145908231 - 2³ = 145908223 is a prime.

It is a super-2 number, since 2×145908231² = 42578423747098722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145908192 and 145908201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145908211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30556 + ... + 35006.

It is an arithmetic number, because the mean of its divisors is an integer number (9473856).

Almost surely, 2^145908231 is an apocalyptic number.

145908231 is a deficient number, since it is larger than the sum of its proper divisors (81464313).

145908231 is a wasteful number, since it uses less digits than its factorization.

145908231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691 (or 4684 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 145908231 is about 12079.2479484445. The cubic root of 145908231 is about 526.4533949723.

The spelling of 145908231 in words is "one hundred forty-five million, nine hundred eight thousand, two hundred thirty-one".