55333240 has 16 divisors (see below), whose sum is σ = 124499880. Its totient is φ = 22133280.

The previous prime is 55333199. The next prime is 55333277. The reversal of 55333240 is 4233355.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691626 + ... + 691705.

Almost surely, 2^55333240 is an apocalyptic number.

It is an amenable number.

55333240 is an abundant number, since it is smaller than the sum of its proper divisors (69166640).

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

55333240 is a wasteful number, since it uses less digits than its factorization.

55333240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383342 (or 1383338 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 55333240 is about 7438.6315945878. The cubic root of 55333240 is about 381.0617581864.

Adding to 55333240 its reverse (4233355), we get a palindrome (59566595).

The spelling of 55333240 in words is "fifty-five million, three hundred thirty-three thousand, two hundred forty".