55366280 has 32 divisors (see below), whose sum is σ = 131903640. Its totient is φ = 20843520.

The previous prime is 55366261. The next prime is 55366301. The reversal of 55366280 is 8266355.

It can be written as a sum of positive squares in 4 ways, for example, as 55323844 + 42436 = 7438^2 + 206^2 .

It is a super-2 number, since 2×55366280² = 6130849922076800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55366280.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40031 + ... + 41390.

Almost surely, 2^55366280 is an apocalyptic number.

It is an amenable number.

55366280 is an abundant number, since it is smaller than the sum of its proper divisors (76537360).

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

55366280 is a wasteful number, since it uses less digits than its factorization.

55366280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81449 (or 81445 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 55366280 is about 7440.8521017421. The cubic root of 55366280 is about 381.1375882866.

The spelling of 55366280 in words is "fifty-five million, three hundred sixty-six thousand, two hundred eighty".