1015453981 has 2 divisors, whose sum is σ = 1015453982. Its totient is φ = 1015453980.

The previous prime is 1015453969. The next prime is 1015453991. The reversal of 1015453981 is 1893545101.

1015453981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 936972100 + 78481881 = 30610^2 + 8859^2 .

It is a cyclic number.

It is not a de Polignac number, because 1015453981 - 2⁷ = 1015453853 is a prime.

It is a super-2 number, since 2×1015453981² = 2062293575057496722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1015453981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015453931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507726990 + 507726991.

It is an arithmetic number, because the mean of its divisors is an integer number (507726991).

Almost surely, 2^1015453981 is an apocalyptic number.

It is an amenable number.

1015453981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015453981 is an equidigital number, since it uses as much as digits as its factorization.

1015453981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 1015453981 is about 31866.1886801669. The cubic root of 1015453981 is about 1005.1250163367.

The spelling of 1015453981 in words is "one billion, fifteen million, four hundred fifty-three thousand, nine hundred eighty-one".