55261345 has 4 divisors (see below), whose sum is σ = 66313620. Its totient is φ = 44209072.

The previous prime is 55261307. The next prime is 55261357. The reversal of 55261345 is 54316255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32182929 + 23078416 = 5673^2 + 4804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55261345 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5526130 + ... + 5526139.

It is an arithmetic number, because the mean of its divisors is an integer number (16578405).

Almost surely, 2^55261345 is an apocalyptic number.

It is an amenable number.

55261345 is a deficient number, since it is larger than the sum of its proper divisors (11052275).

55261345 is a wasteful number, since it uses less digits than its factorization.

55261345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11052274.

The product of its digits is 18000, while the sum is 31.

The square root of 55261345 is about 7433.7974817720. The cubic root of 55261345 is about 380.8966476117.

The spelling of 55261345 in words is "fifty-five million, two hundred sixty-one thousand, three hundred forty-five".