1516375481 has 2 divisors, whose sum is σ = 1516375482. Its totient is φ = 1516375480.

The previous prime is 1516375459. The next prime is 1516375493. The reversal of 1516375481 is 1845736151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1388233081 + 128142400 = 37259^2 + 11320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1516375481 - 2²⁶ = 1449266617 is a prime.

It is a super-2 number, since 2×1516375481² = 4598789198755962722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1516375781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 758187740 + 758187741.

It is an arithmetic number, because the mean of its divisors is an integer number (758187741).

Almost surely, 2^1516375481 is an apocalyptic number.

It is an amenable number.

1516375481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516375481 is an equidigital number, since it uses as much as digits as its factorization.

1516375481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 1516375481 is about 38940.6661601981. Note that the first 3 decimals coincide. The cubic root of 1516375481 is about 1148.8647854837.

The spelling of 1516375481 in words is "one billion, five hundred sixteen million, three hundred seventy-five thousand, four hundred eighty-one".