55540312 has 16 divisors (see below), whose sum is σ = 104427360. Its totient is φ = 27693024.

The previous prime is 55540301. The next prime is 55540319. The reversal of 55540312 is 21304555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55540319) 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, 6523 + ... + 12394.

It is an arithmetic number, because the mean of its divisors is an integer number (6526710).

Almost surely, 2^55540312 is an apocalyptic number.

It is an amenable number.

55540312 is a deficient number, since it is larger than the sum of its proper divisors (48887048).

55540312 is a wasteful number, since it uses less digits than its factorization.

55540312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19290 (or 19286 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55540312 is about 7452.5372860523. The cubic root of 55540312 is about 381.5365119617.

Adding to 55540312 its reverse (21304555), we get a palindrome (76844867).

The spelling of 55540312 in words is "fifty-five million, five hundred forty thousand, three hundred twelve".