55406775 has 12 divisors (see below), whose sum is σ = 91605992. Its totient is φ = 29550240.

The previous prime is 55406731. The next prime is 55406777. The reversal of 55406775 is 57760455.

It is not a de Polignac number, because 55406775 - 2¹² = 55402679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55406777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 369304 + ... + 369453.

Almost surely, 2^55406775 is an apocalyptic number.

55406775 is a deficient number, since it is larger than the sum of its proper divisors (36199217).

55406775 is a wasteful number, since it uses less digits than its factorization.

55406775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738770 (or 738765 counting only the distinct ones).

The product of its (nonzero) digits is 147000, while the sum is 39.

The square root of 55406775 is about 7443.5727308867. The cubic root of 55406775 is about 381.2304872213.

The spelling of 55406775 in words is "fifty-five million, four hundred six thousand, seven hundred seventy-five".