145434552315231 has 4 divisors (see below), whose sum is σ = 193912736420312. Its totient is φ = 96956368210152.

The previous prime is 145434552315113. The next prime is 145434552315233. The reversal of 145434552315231 is 132513255434541.

145434552315231 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.

It is not a de Polignac number, because 145434552315231 - 2³⁰ = 145433478573407 is a prime.

It is a super-4 number, since 4×145434552315231⁴ (a number of 58 digits) contains 4444 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 (145434552315233) 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, 24239092052536 + ... + 24239092052541.

It is an arithmetic number, because the mean of its divisors is an integer number (48478184105078).

Almost surely, 2^{145434552315231} is an apocalyptic number.

145434552315231 is a deficient number, since it is larger than the sum of its proper divisors (48478184105081).

145434552315231 is an equidigital number, since it uses as much as digits as its factorization.

145434552315231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48478184105080.

The product of its digits is 4320000, while the sum is 48.

The spelling of 145434552315231 in words is "one hundred forty-five trillion, four hundred thirty-four billion, five hundred fifty-two million, three hundred fifteen thousand, two hundred thirty-one".