2185153816 has 8 divisors (see below), whose sum is σ = 4097163420. Its totient is φ = 1092576904.

The previous prime is 2185153781. The next prime is 2185153819. The reversal of 2185153816 is 6183515812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185153819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136572106 + ... + 136572121.

Almost surely, 2^2185153816 is an apocalyptic number.

It is an amenable number.

2185153816 is a deficient number, since it is larger than the sum of its proper divisors (1912009604).

2185153816 is a wasteful number, since it uses less digits than its factorization.

2185153816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273144233 (or 273144229 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The square root of 2185153816 is about 46745.6288437753. The cubic root of 2185153816 is about 1297.6592624301.

The spelling of 2185153816 in words is "two billion, one hundred eighty-five million, one hundred fifty-three thousand, eight hundred sixteen".