55533340 has 12 divisors (see below), whose sum is σ = 116620056. Its totient is φ = 22213328.

The previous prime is 55533329. The next prime is 55533341. The reversal of 55533340 is 4333555.

It is a junction number, because it is equal to n+sod(n) for n = 55533299 and 55533308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55533341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388314 + ... + 1388353.

It is an arithmetic number, because the mean of its divisors is an integer number (9718338).

Almost surely, 2^55533340 is an apocalyptic number.

It is an amenable number.

55533340 is an abundant number, since it is smaller than the sum of its proper divisors (61086716).

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

55533340 is a wasteful number, since it uses less digits than its factorization.

55533340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776676 (or 2776674 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 28.

The square root of 55533340 is about 7452.0695112163. The cubic root of 55533340 is about 381.5205464778.

Adding to 55533340 its reverse (4333555), we get a palindrome (59866895).

The spelling of 55533340 in words is "fifty-five million, five hundred thirty-three thousand, three hundred forty".