1516251487 has 2 divisors, whose sum is σ = 1516251488. Its totient is φ = 1516251486.

The previous prime is 1516251469. The next prime is 1516251493. The reversal of 1516251487 is 7841526151.

It is a strong prime.

It is an emirp because it is prime and its reverse (7841526151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1516251487 - 2¹¹ = 1516249439 is a prime.

It is a super-2 number, since 2×1516251487² = 4598037143659422338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1516251467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 758125743 + 758125744.

It is an arithmetic number, because the mean of its divisors is an integer number (758125744).

Almost surely, 2^1516251487 is an apocalyptic number.

1516251487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516251487 is an equidigital number, since it uses as much as digits as its factorization.

1516251487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 40.

The square root of 1516251487 is about 38939.0740388109. The cubic root of 1516251487 is about 1148.8334704115.

The spelling of 1516251487 in words is "one billion, five hundred sixteen million, two hundred fifty-one thousand, four hundred eighty-seven".