145215533 has 2 divisors, whose sum is σ = 145215534. Its totient is φ = 145215532.

The previous prime is 145215529. The next prime is 145215607. The reversal of 145215533 is 335512541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130942249 + 14273284 = 11443^2 + 3778^2 .

It is a cyclic number.

It is not a de Polignac number, because 145215533 - 2² = 145215529 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 145215496 and 145215505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145215523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72607766 + 72607767.

It is an arithmetic number, because the mean of its divisors is an integer number (72607767).

Almost surely, 2^145215533 is an apocalyptic number.

It is an amenable number.

145215533 is a deficient number, since it is larger than the sum of its proper divisors (1).

145215533 is an equidigital number, since it uses as much as digits as its factorization.

145215533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 29.

The square root of 145215533 is about 12050.5407762473. The cubic root of 145215533 is about 525.6189621866.

The spelling of 145215533 in words is "one hundred forty-five million, two hundred fifteen thousand, five hundred thirty-three".