1516420253 has 2 divisors, whose sum is σ = 1516420254. Its totient is φ = 1516420252.

The previous prime is 1516420231. The next prime is 1516420277. The reversal of 1516420253 is 3520246151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1336779844 + 179640409 = 36562^2 + 13403^2 .

It is a cyclic number.

It is not a de Polignac number, because 1516420253 - 2⁸ = 1516419997 is a prime.

It is a super-3 number, since 3×1516420253³ (a number of 29 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1516420853) 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, 758210126 + 758210127.

It is an arithmetic number, because the mean of its divisors is an integer number (758210127).

Almost surely, 2^1516420253 is an apocalyptic number.

It is an amenable number.

1516420253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516420253 is an equidigital number, since it uses as much as digits as its factorization.

1516420253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1516420253 is about 38941.2410305578. The cubic root of 1516420253 is about 1148.8760923727.

The spelling of 1516420253 in words is "one billion, five hundred sixteen million, four hundred twenty thousand, two hundred fifty-three".