55232215040 has 96 divisors (see below), whose sum is σ = 133216377840. Its totient is φ = 21977628672.

The previous prime is 55232215007. The next prime is 55232215139. The reversal of 55232215040 is 4051223255.

It is a junction number, because it is equal to n+sod(n) for n = 55232214994 and 55232215012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1962347 + ... + 1990293.

Almost surely, 2^55232215040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55232215040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66608188920).

55232215040 is an abundant number, since it is smaller than the sum of its proper divisors (77984162800).

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

55232215040 is a wasteful number, since it uses less digits than its factorization.

55232215040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28167 (or 28147 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 55232215040 its reverse (4051223255), we get a palindrome (59283438295).

The spelling of 55232215040 in words is "fifty-five billion, two hundred thirty-two million, two hundred fifteen thousand, forty".