1216514653431 has 96 divisors (see below), whose sum is σ = 2078694955008. Its totient is φ = 619280640000.

The previous prime is 1216514653421. The next prime is 1216514653441. The reversal of 1216514653431 is 1343564156121.

It is an interprime number because it is at equal distance from previous prime (1216514653421) and next prime (1216514653441).

It is not a de Polignac number, because 1216514653431 - 2¹³ = 1216514645239 is a prime.

It is a super-2 number, since 2×1216514653431² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216514653421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 41990791 + ... + 42019751.

It is an arithmetic number, because the mean of its divisors is an integer number (21653072448).

Almost surely, 2^{1216514653431} is an apocalyptic number.

1216514653431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1216514653431 is a deficient number, since it is larger than the sum of its proper divisors (862180301577).

1216514653431 is a wasteful number, since it uses less digits than its factorization.

1216514653431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29325 (or 29314 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 1216514653431 in words is "one trillion, two hundred sixteen billion, five hundred fourteen million, six hundred fifty-three thousand, four hundred thirty-one".