55144769 has 2 divisors, whose sum is σ = 55144770. Its totient is φ = 55144768.

The previous prime is 55144741. The next prime is 55144781. The reversal of 55144769 is 96744155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54937744 + 207025 = 7412^2 + 455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55144769 is a prime.

It is a super-2 number, since 2×55144769² = 6081891096126722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55144729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27572384 + 27572385.

It is an arithmetic number, because the mean of its divisors is an integer number (27572385).

Almost surely, 2^55144769 is an apocalyptic number.

It is an amenable number.

55144769 is a deficient number, since it is larger than the sum of its proper divisors (1).

55144769 is an equidigital number, since it uses as much as digits as its factorization.

55144769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 55144769 is about 7425.9523968310. The cubic root of 55144769 is about 380.6286201879.

The spelling of 55144769 in words is "fifty-five million, one hundred forty-four thousand, seven hundred sixty-nine".