2155633366 has 4 divisors (see below), whose sum is σ = 3233450052. Its totient is φ = 1077816682.

The previous prime is 2155633351. The next prime is 2155633399. The reversal of 2155633366 is 6633365512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2155633366² = 9293510417224979912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538908340 + ... + 538908343.

It is an arithmetic number, because the mean of its divisors is an integer number (808362513).

Almost surely, 2^2155633366 is an apocalyptic number.

2155633366 is a deficient number, since it is larger than the sum of its proper divisors (1077816686).

2155633366 is a wasteful number, since it uses less digits than its factorization.

2155633366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077816685.

The product of its digits is 291600, while the sum is 40.

The square root of 2155633366 is about 46428.7988860362. The cubic root of 2155633366 is about 1291.7891497272.

Adding to 2155633366 its reverse (6633365512), we get a palindrome (8788998878).

The spelling of 2155633366 in words is "two billion, one hundred fifty-five million, six hundred thirty-three thousand, three hundred sixty-six".