15101312981 has 2 divisors, whose sum is σ = 15101312982. Its totient is φ = 15101312980.

The previous prime is 15101312953. The next prime is 15101313001. The reversal of 15101312981 is 18921310151.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12253383025 + 2847929956 = 110695^2 + 53366^2 .

It is a cyclic number.

It is not a de Polignac number, because 15101312981 - 2¹⁴ = 15101296597 is a prime.

It is a super-2 number, since 2×15101312981² (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 (15101315981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7550656490 + 7550656491.

It is an arithmetic number, because the mean of its divisors is an integer number (7550656491).

Almost surely, 2^15101312981 is an apocalyptic number.

It is an amenable number.

15101312981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15101312981 is an equidigital number, since it uses as much as digits as its factorization.

15101312981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 32.

The spelling of 15101312981 in words is "fifteen billion, one hundred one million, three hundred twelve thousand, nine hundred eighty-one".