55875555 has 32 divisors (see below), whose sum is σ = 100147200. Its totient is φ = 29556576.

The previous prime is 55875551. The next prime is 55875559. The reversal of 55875555 is 55557855.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55875551) and next prime (55875559).

It is not a de Polignac number, because 55875555 - 2² = 55875551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55875555.

It is not an unprimeable number, because it can be changed into a prime (55875551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15516 + ... + 18774.

It is an arithmetic number, because the mean of its divisors is an integer number (3129600).

Almost surely, 2^55875555 is an apocalyptic number.

55875555 is a deficient number, since it is larger than the sum of its proper divisors (44271645).

55875555 is a wasteful number, since it uses less digits than its factorization.

55875555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400 (or 3394 counting only the distinct ones).

The product of its digits is 875000, while the sum is 45.

The square root of 55875555 is about 7474.9953177243. The cubic root of 55875555 is about 382.3026278918.

The spelling of 55875555 in words is "fifty-five million, eight hundred seventy-five thousand, five hundred fifty-five".