55875240 has 48 divisors (see below), whose sum is σ = 181595700. Its totient is φ = 14899968.

The previous prime is 55875233. The next prime is 55875247. The reversal of 55875240 is 4257855.

It is a happy number.

55875240 is a `hidden beast` number, since 55 + 87 + 524 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (55875233) and next prime (55875247).

It can be written as a sum of positive squares in 2 ways, for example, as 45724644 + 10150596 = 6762^2 + 3186^2 .

It is a super-3 number, since 3×55875240³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55875195 and 55875204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55875247) 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, 77245 + ... + 77964.

Almost surely, 2^55875240 is an apocalyptic number.

It is an amenable number.

55875240 is an abundant number, since it is smaller than the sum of its proper divisors (125720460).

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

55875240 is a wasteful number, since it uses less digits than its factorization.

55875240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155226 (or 155219 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 55875240 is about 7474.9742474473. The cubic root of 55875240 is about 382.3019094765.

The spelling of 55875240 in words is "fifty-five million, eight hundred seventy-five thousand, two hundred forty".