1215157679471 has 2 divisors, whose sum is σ = 1215157679472. Its totient is φ = 1215157679470.

The previous prime is 1215157679423. The next prime is 1215157679473. The reversal of 1215157679471 is 1749767515121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215157679471 is a prime.

It is a super-3 number, since 3×1215157679471³ (a number of 37 digits) contains 333 as substring.

Together with 1215157679473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215157679473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607578839735 + 607578839736.

It is an arithmetic number, because the mean of its divisors is an integer number (607578839736).

Almost surely, 2^{1215157679471} is an apocalyptic number.

1215157679471 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215157679471 is an equidigital number, since it uses as much as digits as its factorization.

1215157679471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3704400, while the sum is 56.

The spelling of 1215157679471 in words is "one trillion, two hundred fifteen billion, one hundred fifty-seven million, six hundred seventy-nine thousand, four hundred seventy-one".