145751531 has 2 divisors, whose sum is σ = 145751532. Its totient is φ = 145751530.

The previous prime is 145751471. The next prime is 145751533. The reversal of 145751531 is 135157541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145751531 - 2¹⁸ = 145489387 is a prime.

It is a super-2 number, since 2×145751531² = 42487017577687922, which contains 22 as substring.

Together with 145751533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145751533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72875765 + 72875766.

It is an arithmetic number, because the mean of its divisors is an integer number (72875766).

Almost surely, 2^145751531 is an apocalyptic number.

145751531 is a deficient number, since it is larger than the sum of its proper divisors (1).

145751531 is an equidigital number, since it uses as much as digits as its factorization.

145751531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 32.

The square root of 145751531 is about 12072.7598750244. The cubic root of 145751531 is about 526.2648636918.

The spelling of 145751531 in words is "one hundred forty-five million, seven hundred fifty-one thousand, five hundred thirty-one".