145213553 has 2 divisors, whose sum is σ = 145213554. Its totient is φ = 145213552.

The previous prime is 145213547. The next prime is 145213619. The reversal of 145213553 is 355312541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110838784 + 34374769 = 10528^2 + 5863^2 .

It is an emirp because it is prime and its reverse (355312541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145213553 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145213543) 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, 72606776 + 72606777.

It is an arithmetic number, because the mean of its divisors is an integer number (72606777).

Almost surely, 2^145213553 is an apocalyptic number.

It is an amenable number.

145213553 is a deficient number, since it is larger than the sum of its proper divisors (1).

145213553 is an equidigital number, since it uses as much as digits as its factorization.

145213553 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 145213553 is about 12050.4586219778. The cubic root of 145213553 is about 525.6165732542.

The spelling of 145213553 in words is "one hundred forty-five million, two hundred thirteen thousand, five hundred fifty-three".