2215161263412 has 24 divisors (see below), whose sum is σ = 5743010683200. Its totient is φ = 738387087768.

The previous prime is 2215161263411. The next prime is 2215161263473. The reversal of 2215161263412 is 2143621615122.

2215161263412 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 1 + 6 + 1 + 2 + 634 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215161263411) 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 in 7 ways as a sum of consecutive naturals, for example, 10255376112 + ... + 10255376327.

It is an arithmetic number, because the mean of its divisors is an integer number (239292111800).

Almost surely, 2^{2215161263412} is an apocalyptic number.

It is an amenable number.

2215161263412 is an abundant number, since it is smaller than the sum of its proper divisors (3527849419788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2215161263412 is a wasteful number, since it uses less digits than its factorization.

2215161263412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20510752452 (or 20510752444 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

Adding to 2215161263412 its reverse (2143621615122), we get a palindrome (4358782878534).

The spelling of 2215161263412 in words is "two trillion, two hundred fifteen billion, one hundred sixty-one million, two hundred sixty-three thousand, four hundred twelve".