55471807 has 2 divisors, whose sum is σ = 55471808. Its totient is φ = 55471806.

The previous prime is 55471777. The next prime is 55471853. The reversal of 55471807 is 70817455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55471807 - 2²³ = 47083199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55474807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27735903 + 27735904.

It is an arithmetic number, because the mean of its divisors is an integer number (27735904).

Almost surely, 2^55471807 is an apocalyptic number.

55471807 is a deficient number, since it is larger than the sum of its proper divisors (1).

55471807 is an equidigital number, since it uses as much as digits as its factorization.

55471807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 55471807 is about 7447.9397822485. The cubic root of 55471807 is about 381.3795814292.

It can be divided in two parts, 554 and 71807, that added together give a square (72361 = 269²).

The spelling of 55471807 in words is "fifty-five million, four hundred seventy-one thousand, eight hundred seven".