1516501999 has 2 divisors, whose sum is σ = 1516502000. Its totient is φ = 1516501998.

The previous prime is 1516501979. The next prime is 1516502021. The reversal of 1516501999 is 9991056151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1516501999 - 2⁹ = 1516501487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1516501979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 758250999 + 758251000.

It is an arithmetic number, because the mean of its divisors is an integer number (758251000).

Almost surely, 2^1516501999 is an apocalyptic number.

1516501999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516501999 is an equidigital number, since it uses as much as digits as its factorization.

1516501999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109350, while the sum is 46.

The square root of 1516501999 is about 38942.2906234341. The cubic root of 1516501999 is about 1148.8967362405.

The spelling of 1516501999 in words is "one billion, five hundred sixteen million, five hundred one thousand, nine hundred ninety-nine".