2154123266 has 8 divisors (see below), whose sum is σ = 3231530640. Its totient is φ = 1076946388.

The previous prime is 2154123263. The next prime is 2154123287. The reversal of 2154123266 is 6623214512.

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

It is not an unprimeable number, because it can be changed into a prime (2154123263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31976 + ... + 73011.

It is an arithmetic number, because the mean of its divisors is an integer number (403941330).

Almost surely, 2^2154123266 is an apocalyptic number.

2154123266 is a deficient number, since it is larger than the sum of its proper divisors (1077407374).

2154123266 is a wasteful number, since it uses less digits than its factorization.

2154123266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115248.

The product of its digits is 17280, while the sum is 32.

The square root of 2154123266 is about 46412.5335011999. The cubic root of 2154123266 is about 1291.4874307487.

Adding to 2154123266 its reverse (6623214512), we get a palindrome (8777337778).

The spelling of 2154123266 in words is "two billion, one hundred fifty-four million, one hundred twenty-three thousand, two hundred sixty-six".