55819477 has 8 divisors (see below), whose sum is σ = 65096000. Its totient is φ = 47844972.

The previous prime is 55819471. The next prime is 55819507. The reversal of 55819477 is 77491855.

It is a happy number.

It is not a de Polignac number, because 55819477 - 2⁷ = 55819349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55819471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81027 + ... + 81712.

It is an arithmetic number, because the mean of its divisors is an integer number (8137000).

Almost surely, 2^55819477 is an apocalyptic number.

It is an amenable number.

55819477 is a deficient number, since it is larger than the sum of its proper divisors (9276523).

55819477 is an equidigital number, since it uses as much as digits as its factorization.

55819477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162760 (or 162746 counting only the distinct ones).

The product of its digits is 352800, while the sum is 46.

The square root of 55819477 is about 7471.2433369554. The cubic root of 55819477 is about 382.1746891601.

The spelling of 55819477 in words is "fifty-five million, eight hundred nineteen thousand, four hundred seventy-seven".