55146231140 has 144 divisors (see below), whose sum is σ = 156344307840. Its totient is φ = 15866173440.

The previous prime is 55146231139. The next prime is 55146231169. The reversal of 55146231140 is 4113264155.

It is a super-2 number, since 2×55146231140² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55146231097 and 55146231106.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154316 + ... + 366204.

It is an arithmetic number, because the mean of its divisors is an integer number (1085724360).

Almost surely, 2^55146231140 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 55146231140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78172153920).

55146231140 is an abundant number, since it is smaller than the sum of its proper divisors (101198076700).

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

55146231140 is a wasteful number, since it uses less digits than its factorization.

55146231140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211942 (or 211927 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 55146231140 its reverse (4113264155), we get a palindrome (59259495295).

The spelling of 55146231140 in words is "fifty-five billion, one hundred forty-six million, two hundred thirty-one thousand, one hundred forty".