215044145389 has 2 divisors, whose sum is σ = 215044145390. Its totient is φ = 215044145388.

The previous prime is 215044145339. The next prime is 215044145413. The reversal of 215044145389 is 983541440512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163262867364 + 51781278025 = 404058^2 + 227555^2 .

It is a cyclic number.

It is not a de Polignac number, because 215044145389 - 2²³ = 215035756781 is a prime.

It is a super-2 number, since 2×215044145389² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215044145339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107522072694 + 107522072695.

It is an arithmetic number, because the mean of its divisors is an integer number (107522072695).

Almost surely, 2^215044145389 is an apocalyptic number.

It is an amenable number.

215044145389 is a deficient number, since it is larger than the sum of its proper divisors (1).

215044145389 is an equidigital number, since it uses as much as digits as its factorization.

215044145389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 215044145389 in words is "two hundred fifteen billion, forty-four million, one hundred forty-five thousand, three hundred eighty-nine".