2155049620 has 48 divisors (see below), whose sum is σ = 4562707968. Its totient is φ = 854984960.

The previous prime is 2155049609. The next prime is 2155049623. The reversal of 2155049620 is 269405512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155049623) 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 15 ways as a sum of consecutive naturals, for example, 1448517 + ... + 1450003.

It is an arithmetic number, because the mean of its divisors is an integer number (95056416).

Almost surely, 2^2155049620 is an apocalyptic number.

2155049620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155049620 is an abundant number, since it is smaller than the sum of its proper divisors (2407658348).

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

2155049620 is a wasteful number, since it uses less digits than its factorization.

2155049620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 2155049620 is about 46422.5119957979. The cubic root of 2155049620 is about 1291.6725336027.

The spelling of 2155049620 in words is "two billion, one hundred fifty-five million, forty-nine thousand, six hundred twenty".