2154513251 has 8 divisors (see below), whose sum is σ = 2356244208. Its totient is φ = 1953760000.

The previous prime is 2154513199. The next prime is 2154513271. The reversal of 2154513251 is 1523154512.

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 2154513251 - 2¹⁴ = 2154496867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154513271) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 239810 + ... + 248631.

It is an arithmetic number, because the mean of its divisors is an integer number (294530526).

Almost surely, 2^2154513251 is an apocalyptic number.

2154513251 is a deficient number, since it is larger than the sum of its proper divisors (201730957).

2154513251 is a wasteful number, since it uses less digits than its factorization.

2154513251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488853.

The product of its digits is 6000, while the sum is 29.

The square root of 2154513251 is about 46416.7346007881. The cubic root of 2154513251 is about 1291.5653635118.

Adding to 2154513251 its reverse (1523154512), we get a palindrome (3677667763).

The spelling of 2154513251 in words is "two billion, one hundred fifty-four million, five hundred thirteen thousand, two hundred fifty-one".