55513231340 has 48 divisors (see below), whose sum is σ = 136330182912. Its totient is φ = 18590475456.

The previous prime is 55513231283. The next prime is 55513231343. The reversal of 55513231340 is 4313231555.

It is a junction number, because it is equal to n+sod(n) for n = 55513231297 and 55513231306.

It is not an unprimeable number, because it can be changed into a prime (55513231343) 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, 4604714 + ... + 4616753.

It is an arithmetic number, because the mean of its divisors is an integer number (2840212144).

Almost surely, 2^55513231340 is an apocalyptic number.

It is an amenable number.

55513231340 is an abundant number, since it is smaller than the sum of its proper divisors (80816951572).

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

55513231340 is a wasteful number, since it uses less digits than its factorization.

55513231340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9221526 (or 9221524 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 55513231340 its reverse (4313231555), we get a palindrome (59826462895).

The spelling of 55513231340 in words is "fifty-five billion, five hundred thirteen million, two hundred thirty-one thousand, three hundred forty".