2154205902 has 16 divisors (see below), whose sum is σ = 4535170560. Its totient is φ = 680275512.

The previous prime is 2154205901. The next prime is 2154205931. The reversal of 2154205902 is 2095024512.

It is a self number, because there is not a number n which added to its sum of digits gives 2154205902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154205901) 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 7 ways as a sum of consecutive naturals, for example, 9448158 + ... + 9448385.

It is an arithmetic number, because the mean of its divisors is an integer number (283448160).

Almost surely, 2^2154205902 is an apocalyptic number.

2154205902 is an abundant number, since it is smaller than the sum of its proper divisors (2380964658).

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

2154205902 is a wasteful number, since it uses less digits than its factorization.

2154205902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18896567.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2154205902 is about 46413.4237263316. The cubic root of 2154205902 is about 1291.5039451225.

The spelling of 2154205902 in words is "two billion, one hundred fifty-four million, two hundred five thousand, nine hundred two".