15212545189 has 2 divisors, whose sum is σ = 15212545190. Its totient is φ = 15212545188.

The previous prime is 15212545123. The next prime is 15212545241. The reversal of 15212545189 is 98154521251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13399914564 + 1812630625 = 115758^2 + 42575^2 .

It is a cyclic number.

It is not a de Polignac number, because 15212545189 - 2¹⁵ = 15212512421 is a prime.

It is a super-2 number, since 2×15212545189² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15219545189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7606272594 + 7606272595.

It is an arithmetic number, because the mean of its divisors is an integer number (7606272595).

Almost surely, 2^15212545189 is an apocalyptic number.

It is an amenable number.

15212545189 is a deficient number, since it is larger than the sum of its proper divisors (1).

15212545189 is an equidigital number, since it uses as much as digits as its factorization.

15212545189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 43.

The spelling of 15212545189 in words is "fifteen billion, two hundred twelve million, five hundred forty-five thousand, one hundred eighty-nine".