55321455140 has 48 divisors (see below), whose sum is σ = 132826012032. Its totient is φ = 18959567616.

The previous prime is 55321455121. The next prime is 55321455149. The reversal of 55321455140 is 4155412355.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 55321455140.

It is not an unprimeable number, because it can be changed into a prime (55321455149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266327 + ... + 426113.

It is an arithmetic number, because the mean of its divisors is an integer number (2767208584).

Almost surely, 2^55321455140 is an apocalyptic number.

It is an amenable number.

55321455140 is an abundant number, since it is smaller than the sum of its proper divisors (77504556892).

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

55321455140 is a wasteful number, since it uses less digits than its factorization.

55321455140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162276 (or 162274 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

Adding to 55321455140 its reverse (4155412355), we get a palindrome (59476867495).

The spelling of 55321455140 in words is "fifty-five billion, three hundred twenty-one million, four hundred fifty-five thousand, one hundred forty".