55552775 has 24 divisors (see below), whose sum is σ = 72804864. Its totient is φ = 41983200.

The previous prime is 55552771. The next prime is 55552793. The reversal of 55552775 is 57725555.

It is not a de Polignac number, because 55552775 - 2² = 55552771 is a prime.

It is a super-2 number, since 2×55552775² = 6172221620401250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55552771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32492 + ... + 34158.

It is an arithmetic number, because the mean of its divisors is an integer number (3033536).

Almost surely, 2^55552775 is an apocalyptic number.

55552775 is a deficient number, since it is larger than the sum of its proper divisors (17252089).

55552775 is a wasteful number, since it uses less digits than its factorization.

55552775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751 (or 1746 counting only the distinct ones).

The product of its digits is 306250, while the sum is 41.

The square root of 55552775 is about 7453.3733973282. The cubic root of 55552775 is about 381.5650481951.

The spelling of 55552775 in words is "fifty-five million, five hundred fifty-two thousand, seven hundred seventy-five".