2154543154 has 4 divisors (see below), whose sum is σ = 3231814734. Its totient is φ = 1077271576.

The previous prime is 2154543143. The next prime is 2154543163. The reversal of 2154543154 is 4513454512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1634018929 + 520524225 = 40423^2 + 22815^2 .

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 as a sum of consecutive naturals, namely, 538635787 + ... + 538635790.

Almost surely, 2^2154543154 is an apocalyptic number.

2154543154 is a deficient number, since it is larger than the sum of its proper divisors (1077271580).

2154543154 is a wasteful number, since it uses less digits than its factorization.

2154543154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077271579.

The product of its digits is 48000, while the sum is 34.

The square root of 2154543154 is about 46417.0567141003. The cubic root of 2154543154 is about 1291.5713387980.

Adding to 2154543154 its reverse (4513454512), we get a palindrome (6667997666).

The spelling of 2154543154 in words is "two billion, one hundred fifty-four million, five hundred forty-three thousand, one hundred fifty-four".