55996945 has 4 divisors (see below), whose sum is σ = 67196340. Its totient is φ = 44797552.

The previous prime is 55996921. The next prime is 55996949. The reversal of 55996945 is 54969955.

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 18395521 + 37601424 = 4289^2 + 6132^2 .

It is a cyclic number.

It is not a de Polignac number, because 55996945 - 2⁷ = 55996817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55996892 and 55996901.

It is not an unprimeable number, because it can be changed into a prime (55996949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5599690 + ... + 5599699.

It is an arithmetic number, because the mean of its divisors is an integer number (16799085).

Almost surely, 2^55996945 is an apocalyptic number.

It is an amenable number.

55996945 is a deficient number, since it is larger than the sum of its proper divisors (11199395).

55996945 is a wasteful number, since it uses less digits than its factorization.

55996945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11199394.

The product of its digits is 2187000, while the sum is 52.

The square root of 55996945 is about 7483.1106499904. The cubic root of 55996945 is about 382.5792792794.

It can be divided in two parts, 5599 and 6945, that added together give a square (12544 = 112²).

The spelling of 55996945 in words is "fifty-five million, nine hundred ninety-six thousand, nine hundred forty-five".