55162840 has 16 divisors (see below), whose sum is σ = 124116480. Its totient is φ = 22065120.

The previous prime is 55162837. The next prime is 55162847. The reversal of 55162840 is 4826155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55162847) 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, 689496 + ... + 689575.

It is an arithmetic number, because the mean of its divisors is an integer number (7757280).

Almost surely, 2^55162840 is an apocalyptic number.

It is an amenable number.

55162840 is an abundant number, since it is smaller than the sum of its proper divisors (68953640).

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

55162840 is a wasteful number, since it uses less digits than its factorization.

55162840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379082 (or 1379078 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 55162840 is about 7427.1690434512. The cubic root of 55162840 is about 380.6701931162.

Adding to 55162840 its reverse (4826155), we get a palindrome (59988995).

The spelling of 55162840 in words is "fifty-five million, one hundred sixty-two thousand, eight hundred forty".