55131213240 has 48 divisors (see below), whose sum is σ = 179176444200. Its totient is φ = 14701656768.

The previous prime is 55131213211. The next prime is 55131213283. The reversal of 55131213240 is 4231213155.

55131213240 is a `hidden beast` number, since 5 + 513 + 12 + 132 + 4 + 0 = 666.

55131213240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76570770 + ... + 76571489.

Almost surely, 2^55131213240 is an apocalyptic number.

It is an amenable number.

55131213240 is an abundant number, since it is smaller than the sum of its proper divisors (124045230960).

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

55131213240 is a wasteful number, since it uses less digits than its factorization.

55131213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153142276 (or 153142269 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 55131213240 its reverse (4231213155), we get a palindrome (59362426395).

The spelling of 55131213240 in words is "fifty-five billion, one hundred thirty-one million, two hundred thirteen thousand, two hundred forty".