55088540 has 24 divisors (see below), whose sum is σ = 124585440. Its totient is φ = 20340288.

The previous prime is 55088521. The next prime is 55088549. The reversal of 55088540 is 4588055.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55088540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55088549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105680 + ... + 106199.

It is an arithmetic number, because the mean of its divisors is an integer number (5191060).

Almost surely, 2^55088540 is an apocalyptic number.

It is an amenable number.

55088540 is an abundant number, since it is smaller than the sum of its proper divisors (69496900).

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

55088540 is a wasteful number, since it uses less digits than its factorization.

55088540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211901 (or 211899 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

The square root of 55088540 is about 7422.1654522114. The cubic root of 55088540 is about 380.4992054033.

The spelling of 55088540 in words is "fifty-five million, eighty-eight thousand, five hundred forty".