55512556 has 12 divisors (see below), whose sum is σ = 105978600. Its totient is φ = 25232960.

The previous prime is 55512553. The next prime is 55512559. The reversal of 55512556 is 65521555.

It is an interprime number because it is at equal distance from previous prime (55512553) and next prime (55512559).

It is not an unprimeable number, because it can be changed into a prime (55512553) 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, 630781 + ... + 630868.

It is an arithmetic number, because the mean of its divisors is an integer number (8831550).

Almost surely, 2^55512556 is an apocalyptic number.

It is an amenable number.

55512556 is a deficient number, since it is larger than the sum of its proper divisors (50466044).

55512556 is a wasteful number, since it uses less digits than its factorization.

55512556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261664 (or 1261662 counting only the distinct ones).

The product of its digits is 37500, while the sum is 34.

The square root of 55512556 is about 7450.6748687619. The cubic root of 55512556 is about 381.4729443678.

The spelling of 55512556 in words is "fifty-five million, five hundred twelve thousand, five hundred fifty-six".