1215168151 has 2 divisors, whose sum is σ = 1215168152. Its totient is φ = 1215168150.

The previous prime is 1215168113. The next prime is 1215168173. The reversal of 1215168151 is 1518615121.

It is a strong prime.

It is an emirp because it is prime and its reverse (1518615121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215168151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215168181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607584075 + 607584076.

It is an arithmetic number, because the mean of its divisors is an integer number (607584076).

Almost surely, 2^1215168151 is an apocalyptic number.

1215168151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215168151 is an equidigital number, since it uses as much as digits as its factorization.

1215168151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 31.

The square root of 1215168151 is about 34859.2620547251. The cubic root of 1215168151 is about 1067.1172150159.

The spelling of 1215168151 in words is "one billion, two hundred fifteen million, one hundred sixty-eight thousand, one hundred fifty-one".