1516925321 has 2 divisors, whose sum is σ = 1516925322. Its totient is φ = 1516925320.

The previous prime is 1516925303. The next prime is 1516925357. The reversal of 1516925321 is 1235296151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1505440000 + 11485321 = 38800^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1516925321 - 2¹⁴ = 1516908937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1516928321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 758462660 + 758462661.

It is an arithmetic number, because the mean of its divisors is an integer number (758462661).

Almost surely, 2^1516925321 is an apocalyptic number.

It is an amenable number.

1516925321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516925321 is an equidigital number, since it uses as much as digits as its factorization.

1516925321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 35.

The square root of 1516925321 is about 38947.7254919976. The cubic root of 1516925321 is about 1149.0036287289.

The spelling of 1516925321 in words is "one billion, five hundred sixteen million, nine hundred twenty-five thousand, three hundred twenty-one".