55042340 has 12 divisors (see below), whose sum is σ = 115588956. Its totient is φ = 22016928.

The previous prime is 55042331. The next prime is 55042349. The reversal of 55042340 is 4324055.

It is an interprime number because it is at equal distance from previous prime (55042331) and next prime (55042349).

It can be written as a sum of positive squares in 2 ways, for example, as 34175716 + 20866624 = 5846^2 + 4568^2 .

It is not an unprimeable number, because it can be changed into a prime (55042349) 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, 1376039 + ... + 1376078.

It is an arithmetic number, because the mean of its divisors is an integer number (9632413).

Almost surely, 2^55042340 is an apocalyptic number.

It is an amenable number.

55042340 is an abundant number, since it is smaller than the sum of its proper divisors (60546616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55042340 is a wasteful number, since it uses less digits than its factorization.

55042340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752126 (or 2752124 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 55042340 is about 7419.0525001512. The cubic root of 55042340 is about 380.3928071106.

Adding to 55042340 its reverse (4324055), we get a palindrome (59366395).

The spelling of 55042340 in words is "fifty-five million, forty-two thousand, three hundred forty".