145005031 has 4 divisors (see below), whose sum is σ = 145138792. Its totient is φ = 144871272.

The previous prime is 145005013. The next prime is 145005037. The reversal of 145005031 is 130500541.

145005031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130500541 = 1319 ⋅98939.

It is a cyclic number.

It is not a de Polignac number, because 145005031 - 2¹⁷ = 144873959 is a prime.

It is a super-3 number, since 3×145005031³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145005037) 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, 65241 + ... + 67426.

It is an arithmetic number, because the mean of its divisors is an integer number (36284698).

Almost surely, 2^145005031 is an apocalyptic number.

145005031 is a deficient number, since it is larger than the sum of its proper divisors (133761).

145005031 is a wasteful number, since it uses less digits than its factorization.

145005031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133760.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 145005031 is about 12041.8034778849. The cubic root of 145005031 is about 525.3648632251.

Adding to 145005031 its reverse (130500541), we get a palindrome (275505572).

The spelling of 145005031 in words is "one hundred forty-five million, five thousand, thirty-one".