145857183 has 4 divisors (see below), whose sum is σ = 194476248. Its totient is φ = 97238120.

The previous prime is 145857181. The next prime is 145857193. The reversal of 145857183 is 381758541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 381758541 = 3 ⋅127252847.

It is a cyclic number.

It is not a de Polignac number, because 145857183 - 2¹ = 145857181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145857181) 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, 24309528 + ... + 24309533.

It is an arithmetic number, because the mean of its divisors is an integer number (48619062).

Almost surely, 2^145857183 is an apocalyptic number.

145857183 is a deficient number, since it is larger than the sum of its proper divisors (48619065).

145857183 is an equidigital number, since it uses as much as digits as its factorization.

145857183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48619064.

The product of its digits is 134400, while the sum is 42.

The square root of 145857183 is about 12077.1347181358. The cubic root of 145857183 is about 526.3919921589.

The spelling of 145857183 in words is "one hundred forty-five million, eight hundred fifty-seven thousand, one hundred eighty-three".