2155351020 has 48 divisors (see below), whose sum is σ = 6037597440. Its totient is φ = 574511296.

The previous prime is 2155351019. The next prime is 2155351087. The reversal of 2155351020 is 201535512.

It is a happy number.

It is an unprimeable number.

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, 162769 + ... + 175511.

It is an arithmetic number, because the mean of its divisors is an integer number (125783280).

Almost surely, 2^2155351020 is an apocalyptic number.

2155351020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155351020 is an abundant number, since it is smaller than the sum of its proper divisors (3882246420).

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

2155351020 is a wasteful number, since it uses less digits than its factorization.

2155351020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15574 (or 15572 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2155351020 is about 46425.7581521293. The cubic root of 2155351020 is about 1291.7327475223.

Adding to 2155351020 its reverse (201535512), we get a palindrome (2356886532).

The spelling of 2155351020 in words is "two billion, one hundred fifty-five million, three hundred fifty-one thousand, twenty".