1214533153991 has 2 divisors, whose sum is σ = 1214533153992. Its totient is φ = 1214533153990.

The previous prime is 1214533153961. The next prime is 1214533154057. The reversal of 1214533153991 is 1993513354121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1214533153991 is a prime.

It is a super-2 number, since 2×1214533153991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214533153901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607266576995 + 607266576996.

It is an arithmetic number, because the mean of its divisors is an integer number (607266576996).

Almost surely, 2^{1214533153991} is an apocalyptic number.

1214533153991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214533153991 is an equidigital number, since it uses as much as digits as its factorization.

1214533153991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 47.

The spelling of 1214533153991 in words is "one trillion, two hundred fourteen billion, five hundred thirty-three million, one hundred fifty-three thousand, nine hundred ninety-one".