145542031 has 2 divisors, whose sum is σ = 145542032. Its totient is φ = 145542030.

The previous prime is 145542029. The next prime is 145542041. The reversal of 145542031 is 130245541.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (130245541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145542031 - 2¹ = 145542029 is a prime.

It is a super-2 number, since 2×145542031² = 42364965575209922, which contains 22 as substring.

Together with 145542029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 145541987 and 145542005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145542041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72771015 + 72771016.

It is an arithmetic number, because the mean of its divisors is an integer number (72771016).

Almost surely, 2^145542031 is an apocalyptic number.

145542031 is a deficient number, since it is larger than the sum of its proper divisors (1).

145542031 is an equidigital number, since it uses as much as digits as its factorization.

145542031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 145542031 is about 12064.0801970146. The cubic root of 145542031 is about 526.0125956590.

Adding to 145542031 its reverse (130245541), we get a palindrome (275787572).

The spelling of 145542031 in words is "one hundred forty-five million, five hundred forty-two thousand, thirty-one".