55144807 has 2 divisors, whose sum is σ = 55144808. Its totient is φ = 55144806.

The previous prime is 55144781. The next prime is 55144813. The reversal of 55144807 is 70844155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55144807 - 2⁷ = 55144679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55144847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27572403 + 27572404.

It is an arithmetic number, because the mean of its divisors is an integer number (27572404).

Almost surely, 2^55144807 is an apocalyptic number.

55144807 is a deficient number, since it is larger than the sum of its proper divisors (1).

55144807 is an equidigital number, since it uses as much as digits as its factorization.

55144807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 55144807 is about 7425.9549554249. The cubic root of 55144807 is about 380.6287076176.

The spelling of 55144807 in words is "fifty-five million, one hundred forty-four thousand, eight hundred seven".