145534431 has 16 divisors (see below), whose sum is σ = 227761664. Its totient is φ = 80914464.

The previous prime is 145534427. The next prime is 145534439. The reversal of 145534431 is 134435541.

It is not a de Polignac number, because 145534431 - 2² = 145534427 is a prime.

It is a super-2 number, since 2×145534431² = 42360541212987522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145534439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92875 + ... + 94428.

It is an arithmetic number, because the mean of its divisors is an integer number (14235104).

Almost surely, 2^145534431 is an apocalyptic number.

145534431 is a deficient number, since it is larger than the sum of its proper divisors (82227233).

145534431 is a wasteful number, since it uses less digits than its factorization.

145534431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187350.

The product of its digits is 14400, while the sum is 30.

The square root of 145534431 is about 12063.7652082590. The cubic root of 145534431 is about 526.0034396205.

Adding to 145534431 its reverse (134435541), we get a palindrome (279969972).

The spelling of 145534431 in words is "one hundred forty-five million, five hundred thirty-four thousand, four hundred thirty-one".