55380330 has 24 divisors (see below), whose sum is σ = 143989092. Its totient is φ = 14768064.

The previous prime is 55380329. The next prime is 55380331. The reversal of 55380330 is 3308355.

55380330 is a `hidden beast` number, since 553 + 80 + 3 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (55380329) and next prime (55380331).

It can be written as a sum of positive squares in 2 ways, for example, as 54154881 + 1225449 = 7359^2 + 1107^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55380294 and 55380303.

It is not an unprimeable number, because it can be changed into a prime (55380331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307579 + ... + 307758.

Almost surely, 2^55380330 is an apocalyptic number.

55380330 is an abundant number, since it is smaller than the sum of its proper divisors (88608762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55380330 is a wasteful number, since it uses less digits than its factorization.

55380330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615350 (or 615347 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 55380330 is about 7441.7961541553. The cubic root of 55380330 is about 381.1698252980.

Adding to 55380330 its reverse (3308355), we get a palindrome (58688685).

The spelling of 55380330 in words is "fifty-five million, three hundred eighty thousand, three hundred thirty".