145355223 has 8 divisors (see below), whose sum is σ = 208715248. Its totient is φ = 89449344.

The previous prime is 145355201. The next prime is 145355233. The reversal of 145355223 is 322553541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145355223 - 2⁶ = 145355159 is a prime.

It is a super-2 number, since 2×145355223² = 42256281706759458, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145355233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1863490 + ... + 1863567.

It is an arithmetic number, because the mean of its divisors is an integer number (26089406).

Almost surely, 2^145355223 is an apocalyptic number.

145355223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

145355223 is a deficient number, since it is larger than the sum of its proper divisors (63360025).

145355223 is a wasteful number, since it uses less digits than its factorization.

145355223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727073.

The product of its digits is 18000, while the sum is 30.

The square root of 145355223 is about 12056.3353885001. The cubic root of 145355223 is about 525.7874477946.

The spelling of 145355223 in words is "one hundred forty-five million, three hundred fifty-five thousand, two hundred twenty-three".