145031833 has 2 divisors, whose sum is σ = 145031834. Its totient is φ = 145031832.

The previous prime is 145031827. The next prime is 145031869. The reversal of 145031833 is 338130541.

It is the 4917-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142850304 + 2181529 = 11952^2 + 1477^2 .

It is a cyclic number.

It is not a de Polignac number, because 145031833 - 2²¹ = 142934681 is a prime.

It is equal to p_8180326 and since 145031833 and 8180326 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (145031533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72515916 + 72515917.

It is an arithmetic number, because the mean of its divisors is an integer number (72515917).

Almost surely, 2^145031833 is an apocalyptic number.

It is an amenable number.

145031833 is a deficient number, since it is larger than the sum of its proper divisors (1).

145031833 is an equidigital number, since it uses as much as digits as its factorization.

145031833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 145031833 is about 12042.9162996344. The cubic root of 145031833 is about 525.3972298300.

The spelling of 145031833 in words is "one hundred forty-five million, thirty-one thousand, eight hundred thirty-three".