55321445 has 12 divisors (see below), whose sum is σ = 70065900. Its totient is φ = 41926464.

The previous prime is 55321439. The next prime is 55321477. The reversal of 55321445 is 54412355.

It can be written as a sum of positive squares in 2 ways, for example, as 8014561 + 47306884 = 2831^2 + 6878^2 .

It is not a de Polignac number, because 55321445 - 2⁴ = 55321429 is a prime.

It is a Curzon number.

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, 13520 + ... + 17129.

It is an arithmetic number, because the mean of its divisors is an integer number (5838825).

Almost surely, 2^55321445 is an apocalyptic number.

It is an amenable number.

55321445 is a deficient number, since it is larger than the sum of its proper divisors (14744455).

55321445 is a wasteful number, since it uses less digits than its factorization.

55321445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30692 (or 30673 counting only the distinct ones).

The product of its digits is 12000, while the sum is 29.

The square root of 55321445 is about 7437.8387317822. The cubic root of 55321445 is about 381.0346801718.

The spelling of 55321445 in words is "fifty-five million, three hundred twenty-one thousand, four hundred forty-five".