15144042181 has 2 divisors, whose sum is σ = 15144042182. Its totient is φ = 15144042180.

The previous prime is 15144042163. The next prime is 15144042211. The reversal of 15144042181 is 18124044151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12107481156 + 3036561025 = 110034^2 + 55105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15144042181 is a prime.

It is a super-2 number, since 2×15144042181² (a number of 21 digits) contains 22 as substring.

It is a zygodrome in base 5.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15144042101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7572021090 + 7572021091.

It is an arithmetic number, because the mean of its divisors is an integer number (7572021091).

Almost surely, 2^15144042181 is an apocalyptic number.

It is an amenable number.

15144042181 is a deficient number, since it is larger than the sum of its proper divisors (1).

15144042181 is an equidigital number, since it uses as much as digits as its factorization.

15144042181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 31.

The spelling of 15144042181 in words is "fifteen billion, one hundred forty-four million, forty-two thousand, one hundred eighty-one".