145231431 has 8 divisors (see below), whose sum is σ = 193974144. Its totient is φ = 96654840.

The previous prime is 145231409. The next prime is 145231433. The reversal of 145231431 is 134132541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145231431 - 2⁶ = 145231367 is a prime.

It is a super-2 number, since 2×145231431² = 42184337100615522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145231433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39475 + ... + 42996.

It is an arithmetic number, because the mean of its divisors is an integer number (24246768).

Almost surely, 2^145231431 is an apocalyptic number.

145231431 is a deficient number, since it is larger than the sum of its proper divisors (48742713).

145231431 is an equidigital number, since it uses as much as digits as its factorization.

145231431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83061.

The product of its digits is 1440, while the sum is 24.

The square root of 145231431 is about 12051.2003966410. The cubic root of 145231431 is about 525.6381428375.

Adding to 145231431 its reverse (134132541), we get a palindrome (279363972).

The spelling of 145231431 in words is "one hundred forty-five million, two hundred thirty-one thousand, four hundred thirty-one".