55344145 has 32 divisors (see below), whose sum is σ = 71663616. Its totient is φ = 40958400.

The previous prime is 55344143. The next prime is 55344167. The reversal of 55344145 is 54144355.

It is a happy number.

It is not a de Polignac number, because 55344145 - 2¹ = 55344143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55344143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 517182 + ... + 517288.

It is an arithmetic number, because the mean of its divisors is an integer number (2239488).

Almost surely, 2^55344145 is an apocalyptic number.

It is an amenable number.

55344145 is a deficient number, since it is larger than the sum of its proper divisors (16319471).

55344145 is a wasteful number, since it uses less digits than its factorization.

55344145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its digits is 24000, while the sum is 31.

The square root of 55344145 is about 7439.3645561970. The cubic root of 55344145 is about 381.0867895871.

The spelling of 55344145 in words is "fifty-five million, three hundred forty-four thousand, one hundred forty-five".