145330531 has 2 divisors, whose sum is σ = 145330532. Its totient is φ = 145330530.

The previous prime is 145330529. The next prime is 145330567. The reversal of 145330531 is 135033541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145330531 - 2¹ = 145330529 is a prime.

It is a super-3 number, since 3×145330531³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 145330529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 145330496 and 145330505.

It is not a weakly prime, because it can be changed into another prime (145330831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72665265 + 72665266.

It is an arithmetic number, because the mean of its divisors is an integer number (72665266).

Almost surely, 2^145330531 is an apocalyptic number.

145330531 is a deficient number, since it is larger than the sum of its proper divisors (1).

145330531 is an equidigital number, since it uses as much as digits as its factorization.

145330531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 145330531 is about 12055.3113190826. The cubic root of 145330531 is about 525.7576736578.

The spelling of 145330531 in words is "one hundred forty-five million, three hundred thirty thousand, five hundred thirty-one".