145164433 has 4 divisors (see below), whose sum is σ = 146449188. Its totient is φ = 143879680.

The previous prime is 145164421. The next prime is 145164449. The reversal of 145164433 is 334461541.

It is a happy number.

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 69422224 + 75742209 = 8332^2 + 8703^2 .

It is a cyclic number.

It is not a de Polignac number, because 145164433 - 2²⁵ = 111610001 is a prime.

It is a super-2 number, since 2×145164433² = 42145425216422978, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145164395 and 145164404.

It is not an unprimeable number, because it can be changed into a prime (145164463) 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, 642208 + ... + 642433.

It is an arithmetic number, because the mean of its divisors is an integer number (36612297).

Almost surely, 2^145164433 is an apocalyptic number.

It is an amenable number.

145164433 is a deficient number, since it is larger than the sum of its proper divisors (1284755).

145164433 is a wasteful number, since it uses less digits than its factorization.

145164433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284754.

The product of its digits is 17280, while the sum is 31.

The square root of 145164433 is about 12048.4203528927. The cubic root of 145164433 is about 525.5573014732.

The spelling of 145164433 in words is "one hundred forty-five million, one hundred sixty-four thousand, four hundred thirty-three".