1651316263 has 4 divisors (see below), whose sum is σ = 1668340240. Its totient is φ = 1634292288.

The previous prime is 1651316243. The next prime is 1651316297. The reversal of 1651316263 is 3626131561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3626131561 = 13 ⋅278933197.

It is a cyclic number.

It is not a de Polignac number, because 1651316263 - 2²¹ = 1649219111 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 (1651316213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8511843 + ... + 8512036.

It is an arithmetic number, because the mean of its divisors is an integer number (417085060).

Almost surely, 2^1651316263 is an apocalyptic number.

1651316263 is a deficient number, since it is larger than the sum of its proper divisors (17023977).

1651316263 is an equidigital number, since it uses as much as digits as its factorization.

1651316263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17023976.

The product of its digits is 19440, while the sum is 34.

The square root of 1651316263 is about 40636.3908707454. The cubic root of 1651316263 is about 1181.9798857189.

The spelling of 1651316263 in words is "one billion, six hundred fifty-one million, three hundred sixteen thousand, two hundred sixty-three".