55475775 has 36 divisors (see below), whose sum is σ = 100653280. Its totient is φ = 29203200.

The previous prime is 55475773. The next prime is 55475803. The reversal of 55475775 is 57757455.

It is a happy number.

It is not a de Polignac number, because 55475775 - 2¹ = 55475773 is a prime.

It is a super-2 number, since 2×55475775² = 6155123223701250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55475775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55475773) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16215 + ... + 19335.

Almost surely, 2^55475775 is an apocalyptic number.

55475775 is a deficient number, since it is larger than the sum of its proper divisors (45177505).

55475775 is a wasteful number, since it uses less digits than its factorization.

55475775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216 (or 3208 counting only the distinct ones).

The product of its digits is 857500, while the sum is 45.

The square root of 55475775 is about 7448.2061598750. The cubic root of 55475775 is about 381.3886748058.

The spelling of 55475775 in words is "fifty-five million, four hundred seventy-five thousand, seven hundred seventy-five".