2154012251 has 8 divisors (see below), whose sum is σ = 2281128480. Its totient is φ = 2026941568.

The previous prime is 2154012227. The next prime is 2154012253. The reversal of 2154012251 is 1522104512.

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 2154012251 - 2³⁰ = 1080270427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154012253) 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, 158705 + ... + 171741.

It is an arithmetic number, because the mean of its divisors is an integer number (285141060).

Almost surely, 2^2154012251 is an apocalyptic number.

2154012251 is a deficient number, since it is larger than the sum of its proper divisors (127116229).

2154012251 is a wasteful number, since it uses less digits than its factorization.

2154012251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22773.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2154012251 is about 46411.3375265139. The cubic root of 2154012251 is about 1291.4652443148.

Adding to 2154012251 its reverse (1522104512), we get a palindrome (3676116763).

The spelling of 2154012251 in words is "two billion, one hundred fifty-four million, twelve thousand, two hundred fifty-one".