1283216731 has 8 divisors (see below), whose sum is σ = 1287793728. Its totient is φ = 1278648000.

The previous prime is 1283216723. The next prime is 1283216741. The reversal of 1283216731 is 1376123821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1283216731 - 2³ = 1283216723 is a prime.

It is a super-2 number, since 2×1283216731² = 3293290357436652722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1283216741) 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 in 7 ways as a sum of consecutive naturals, for example, 507751 + ... + 510271.

It is an arithmetic number, because the mean of its divisors is an integer number (160974216).

Almost surely, 2^1283216731 is an apocalyptic number.

1283216731 is a deficient number, since it is larger than the sum of its proper divisors (4576997).

1283216731 is a wasteful number, since it uses less digits than its factorization.

1283216731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133.

The product of its digits is 12096, while the sum is 34.

The square root of 1283216731 is about 35822.0146139214. The cubic root of 1283216731 is about 1086.6758223830.

The spelling of 1283216731 in words is "one billion, two hundred eighty-three million, two hundred sixteen thousand, seven hundred thirty-one".