2154510251 has 2 divisors, whose sum is σ = 2154510252. Its totient is φ = 2154510250.

The previous prime is 2154510209. The next prime is 2154510269. The reversal of 2154510251 is 1520154512.

2154510251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2154510251 - 2¹⁴ = 2154493867 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154510251.

It is not a weakly prime, because it can be changed into another prime (2154540251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077255125 + 1077255126.

It is an arithmetic number, because the mean of its divisors is an integer number (1077255126).

Almost surely, 2^2154510251 is an apocalyptic number.

2154510251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154510251 is an equidigital number, since it uses as much as digits as its factorization.

2154510251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 2154510251 is about 46416.7022848457. The cubic root of 2154510251 is about 1291.5647640418.

Adding to 2154510251 its reverse (1520154512), we get a palindrome (3674664763).

The spelling of 2154510251 in words is "two billion, one hundred fifty-four million, five hundred ten thousand, two hundred fifty-one".