230136145 has 4 divisors (see below), whose sum is σ = 276163380. Its totient is φ = 184108912.

The previous prime is 230136143. The next prime is 230136161. The reversal of 230136145 is 541631032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55711296 + 174424849 = 7464^2 + 13207^2 .

It is a cyclic number.

It is not a de Polignac number, because 230136145 - 2¹ = 230136143 is a prime.

It is a super-2 number, since 2×230136145² = 105925290470922050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (230136143) 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, 23013610 + ... + 23013619.

It is an arithmetic number, because the mean of its divisors is an integer number (69040845).

Almost surely, 2^230136145 is an apocalyptic number.

It is an amenable number.

230136145 is a deficient number, since it is larger than the sum of its proper divisors (46027235).

230136145 is an equidigital number, since it uses as much as digits as its factorization.

230136145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46027234.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 230136145 is about 15170.2387917923. The cubic root of 230136145 is about 612.8134350247.

Adding to 230136145 its reverse (541631032), we get a palindrome (771767177).

The spelling of 230136145 in words is "two hundred thirty million, one hundred thirty-six thousand, one hundred forty-five".