15015272981 has 2 divisors, whose sum is σ = 15015272982. Its totient is φ = 15015272980.

The previous prime is 15015272977. The next prime is 15015272989. The reversal of 15015272981 is 18927251051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11624074225 + 3391198756 = 107815^2 + 58234^2 .

It is a cyclic number.

It is not a de Polignac number, because 15015272981 - 2² = 15015272977 is a prime.

It is a super-2 number, since 2×15015272981² (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 (15015272989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7507636490 + 7507636491.

It is an arithmetic number, because the mean of its divisors is an integer number (7507636491).

Almost surely, 2^15015272981 is an apocalyptic number.

It is an amenable number.

15015272981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15015272981 is an equidigital number, since it uses as much as digits as its factorization.

15015272981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 41.

The spelling of 15015272981 in words is "fifteen billion, fifteen million, two hundred seventy-two thousand, nine hundred eighty-one".