2154122544 has 160 divisors (see below), whose sum is σ = 6657224704. Its totient is φ = 587243520.

The previous prime is 2154122543. The next prime is 2154122557. The reversal of 2154122544 is 4452214512.

It is not an unprimeable number, because it can be changed into a prime (2154122543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 758952 + ... + 761784.

Almost surely, 2^2154122544 is an apocalyptic number.

2154122544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154122544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3328612352).

2154122544 is an abundant number, since it is smaller than the sum of its proper divisors (4503102160).

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

2154122544 is a wasteful number, since it uses less digits than its factorization.

2154122544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955 (or 2949 counting only the distinct ones).

The product of its digits is 12800, while the sum is 30.

The square root of 2154122544 is about 46412.5257231278. The cubic root of 2154122544 is about 1291.4872864589.

It can be divided in two parts, 2154 and 122544, that multiplied together give a triangular number (263959776 = T₂₂₉₇₆).

The spelling of 2154122544 in words is "two billion, one hundred fifty-four million, one hundred twenty-two thousand, five hundred forty-four".