1161216015 has 32 divisors (see below), whose sum is σ = 1874534400. Its totient is φ = 613812480.

The previous prime is 1161216013. The next prime is 1161216041. The reversal of 1161216015 is 5106121611.

It is not a de Polignac number, because 1161216015 - 2¹ = 1161216013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161216013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1027971 + ... + 1029099.

It is an arithmetic number, because the mean of its divisors is an integer number (58579200).

Almost surely, 2^1161216015 is an apocalyptic number.

1161216015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161216015 is a deficient number, since it is larger than the sum of its proper divisors (713318385).

1161216015 is a wasteful number, since it uses less digits than its factorization.

1161216015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 1161216015 is about 34076.6197707460. The cubic root of 1161216015 is about 1051.0845980989.

Adding to 1161216015 its reverse (5106121611), we get a palindrome (6267337626).

The spelling of 1161216015 in words is "one billion, one hundred sixty-one million, two hundred sixteen thousand, fifteen".