55212445 has 12 divisors (see below), whose sum is σ = 67920660. Its totient is φ = 43086080.

The previous prime is 55212427. The next prime is 55212463. The reversal of 55212445 is 54421255.

It is an interprime number because it is at equal distance from previous prime (55212427) and next prime (55212463).

It can be written as a sum of positive squares in 6 ways, for example, as 8508889 + 46703556 = 2917^2 + 6834^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55212445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5121 + ... + 11689.

It is an arithmetic number, because the mean of its divisors is an integer number (5660055).

Almost surely, 2^55212445 is an apocalyptic number.

It is an amenable number.

55212445 is a deficient number, since it is larger than the sum of its proper divisors (12708215).

55212445 is an equidigital number, since it uses as much as digits as its factorization.

55212445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6656 (or 6615 counting only the distinct ones).

The product of its digits is 8000, while the sum is 28.

The square root of 55212445 is about 7430.5077215490. The cubic root of 55212445 is about 380.7842643977.

The spelling of 55212445 in words is "fifty-five million, two hundred twelve thousand, four hundred forty-five".