55520477 has 2 divisors, whose sum is σ = 55520478. Its totient is φ = 55520476.

The previous prime is 55520467. The next prime is 55520501. The reversal of 55520477 is 77402555.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33860761 + 21659716 = 5819^2 + 4654^2 .

It is a cyclic number.

It is not a de Polignac number, because 55520477 - 2¹⁶ = 55454941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55520467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27760238 + 27760239.

It is an arithmetic number, because the mean of its divisors is an integer number (27760239).

Almost surely, 2^55520477 is an apocalyptic number.

It is an amenable number.

55520477 is a deficient number, since it is larger than the sum of its proper divisors (1).

55520477 is an equidigital number, since it uses as much as digits as its factorization.

55520477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 55520477 is about 7451.2064123872. The cubic root of 55520477 is about 381.4910874313.

The spelling of 55520477 in words is "fifty-five million, five hundred twenty thousand, four hundred seventy-seven".