2154143123 has 8 divisors (see below), whose sum is σ = 2358713520. Its totient is φ = 1951029280.

The previous prime is 2154143087. The next prime is 2154143137. The reversal of 2154143123 is 3213414512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2154143123 - 2¹² = 2154139027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154143092 and 2154143101.

It is not an unprimeable number, because it can be changed into a prime (2154143623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361040 + ... + 366957.

It is an arithmetic number, because the mean of its divisors is an integer number (294839190).

Almost surely, 2^2154143123 is an apocalyptic number.

2154143123 is a deficient number, since it is larger than the sum of its proper divisors (204570397).

2154143123 is a wasteful number, since it uses less digits than its factorization.

2154143123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728277.

The product of its digits is 2880, while the sum is 26.

The square root of 2154143123 is about 46412.7474192166. The cubic root of 2154143123 is about 1291.4913991052.

Adding to 2154143123 its reverse (3213414512), we get a palindrome (5367557635).

The spelling of 2154143123 in words is "two billion, one hundred fifty-four million, one hundred forty-three thousand, one hundred twenty-three".