2154123030 has 32 divisors (see below), whose sum is σ = 5247062784. Its totient is φ = 565858656.

The previous prime is 2154123019. The next prime is 2154123047. The reversal of 2154123030 is 303214512.

It is a junction number, because it is equal to n+sod(n) for n = 2154122988 and 2154123006.

It is a congruent 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, 533842 + ... + 537861.

It is an arithmetic number, because the mean of its divisors is an integer number (163970712).

Almost surely, 2^2154123030 is an apocalyptic number.

2154123030 is an abundant number, since it is smaller than the sum of its proper divisors (3092939754).

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

2154123030 is a wasteful number, since it uses less digits than its factorization.

2154123030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071780.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2154123030 is about 46412.5309587831. The cubic root of 2154123030 is about 1291.4873835847.

Adding to 2154123030 its reverse (303214512), we get a palindrome (2457337542).

The spelling of 2154123030 in words is "two billion, one hundred fifty-four million, one hundred twenty-three thousand, thirty".