1013915521 has 2 divisors, whose sum is σ = 1013915522. Its totient is φ = 1013915520.

The previous prime is 1013915473. The next prime is 1013915569. The reversal of 1013915521 is 1255193101.

It is a balanced prime because it is at equal distance from previous prime (1013915473) and next prime (1013915569).

It can be written as a sum of positive squares in only one way, i.e., 1013721921 + 193600 = 31839^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013915521 - 2¹³ = 1013907329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1013915521.

It is not a weakly prime, because it can be changed into another prime (1013915821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506957760 + 506957761.

It is an arithmetic number, because the mean of its divisors is an integer number (506957761).

Almost surely, 2^1013915521 is an apocalyptic number.

It is an amenable number.

1013915521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013915521 is an equidigital number, since it uses as much as digits as its factorization.

1013915521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 1013915521 is about 31842.0401513471. The cubic root of 1013915521 is about 1004.6171560602.

The spelling of 1013915521 in words is "one billion, thirteen million, nine hundred fifteen thousand, five hundred twenty-one".