2154618551 has 2 divisors, whose sum is σ = 2154618552. Its totient is φ = 2154618550.

The previous prime is 2154618527. The next prime is 2154618553. The reversal of 2154618551 is 1558164512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2154618551 - 2²² = 2150424247 is a prime.

It is a super-2 number, since 2×2154618551² = 9284762200626679202, which contains 22 as substring.

Together with 2154618553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154618553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077309275 + 1077309276.

It is an arithmetic number, because the mean of its divisors is an integer number (1077309276).

Almost surely, 2^2154618551 is an apocalyptic number.

2154618551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154618551 is an equidigital number, since it uses as much as digits as its factorization.

2154618551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 38.

The square root of 2154618551 is about 46417.8688761128. The cubic root of 2154618551 is about 1291.5864045547.

The spelling of 2154618551 in words is "two billion, one hundred fifty-four million, six hundred eighteen thousand, five hundred fifty-one".