55142342240 has 24 divisors (see below), whose sum is σ = 130273783920. Its totient is φ = 22056936832.

The previous prime is 55142342239. The next prime is 55142342263. The reversal of 55142342240 is 4224324155.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 55142342197 and 55142342206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172319660 + ... + 172319979.

It is an arithmetic number, because the mean of its divisors is an integer number (5428074330).

Almost surely, 2^55142342240 is an apocalyptic number.

It is an amenable number.

55142342240 is an abundant number, since it is smaller than the sum of its proper divisors (75131441680).

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

55142342240 is a wasteful number, since it uses less digits than its factorization.

55142342240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344639654 (or 344639646 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 55142342240 its reverse (4224324155), we get a palindrome (59366666395).

The spelling of 55142342240 in words is "fifty-five billion, one hundred forty-two million, three hundred forty-two thousand, two hundred forty".