55565140 has 12 divisors (see below), whose sum is σ = 116686836. Its totient is φ = 22226048.

The previous prime is 55565137. The next prime is 55565143. The reversal of 55565140 is 4156555.

It is an interprime number because it is at equal distance from previous prime (55565137) and next prime (55565143).

It can be written as a sum of positive squares in 2 ways, for example, as 34880836 + 20684304 = 5906^2 + 4548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55565143) 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, 1389109 + ... + 1389148.

It is an arithmetic number, because the mean of its divisors is an integer number (9723903).

Almost surely, 2^55565140 is an apocalyptic number.

It is an amenable number.

55565140 is an abundant number, since it is smaller than the sum of its proper divisors (61121696).

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

55565140 is a wasteful number, since it uses less digits than its factorization.

55565140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778266 (or 2778264 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 55565140 is about 7454.2028413506. The cubic root of 55565140 is about 381.5933558228.

The spelling of 55565140 in words is "fifty-five million, five hundred sixty-five thousand, one hundred forty".