55002140 has 24 divisors (see below), whose sum is σ = 122299632. Its totient is φ = 20706560.

The previous prime is 55002139. The next prime is 55002149. The reversal of 55002140 is 4120055.

55002140 is nontrivially palindromic in base 13.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55002149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80546 + ... + 81225.

It is an arithmetic number, because the mean of its divisors is an integer number (5095818).

Almost surely, 2^55002140 is an apocalyptic number.

It is an amenable number.

55002140 is an abundant number, since it is smaller than the sum of its proper divisors (67297492).

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

55002140 is a wasteful number, since it uses less digits than its factorization.

55002140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161797 (or 161795 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 55002140 is about 7416.3427644628. The cubic root of 55002140 is about 380.3001783263.

Adding to 55002140 its reverse (4120055), we get a palindrome (59122195).

The spelling of 55002140 in words is "fifty-five million, two thousand, one hundred forty".