1216482531 has 16 divisors (see below), whose sum is σ = 1770067200. Its totient is φ = 736996320.

The previous prime is 1216482511. The next prime is 1216482539. The reversal of 1216482531 is 1352846121.

It is not a de Polignac number, because 1216482531 - 2¹⁵ = 1216449763 is a prime.

It is a super-2 number, since 2×1216482531² = 2959659496456331922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1216482492 and 1216482501.

It is not an unprimeable number, because it can be changed into a prime (1216482539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125445 + ... + 134793.

It is an arithmetic number, because the mean of its divisors is an integer number (110629200).

Almost surely, 2^1216482531 is an apocalyptic number.

1216482531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1216482531 is a deficient number, since it is larger than the sum of its proper divisors (553584669).

1216482531 is a wasteful number, since it uses less digits than its factorization.

1216482531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13306.

The product of its digits is 11520, while the sum is 33.

The square root of 1216482531 is about 34878.1096248062. The cubic root of 1216482531 is about 1067.5018235503.

The spelling of 1216482531 in words is "one billion, two hundred sixteen million, four hundred eighty-two thousand, five hundred thirty-one".