1516556253 has 4 divisors (see below), whose sum is σ = 2022075008. Its totient is φ = 1011037500.

The previous prime is 1516556243. The next prime is 1516556263. The reversal of 1516556253 is 3526556151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3526556151 = 3 ⋅1175518717.

It is an interprime number because it is at equal distance from previous prime (1516556243) and next prime (1516556263).

It is not a de Polignac number, because 1516556253 - 2¹⁷ = 1516425181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516556203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252759373 + ... + 252759378.

It is an arithmetic number, because the mean of its divisors is an integer number (505518752).

Almost surely, 2^1516556253 is an apocalyptic number.

It is an amenable number.

1516556253 is a deficient number, since it is larger than the sum of its proper divisors (505518755).

1516556253 is an equidigital number, since it uses as much as digits as its factorization.

1516556253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505518754.

The product of its digits is 135000, while the sum is 39.

The square root of 1516556253 is about 38942.9872120771. The cubic root of 1516556253 is about 1148.9104369588.

The spelling of 1516556253 in words is "one billion, five hundred sixteen million, five hundred fifty-six thousand, two hundred fifty-three".