55212322540 has 24 divisors (see below), whose sum is σ = 115967072592. Its totient is φ = 22080891840.

The previous prime is 55212322537. The next prime is 55212322579. The reversal of 55212322540 is 4522321255.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138939 + ... + 360178.

It is an arithmetic number, because the mean of its divisors is an integer number (4831961358).

Almost surely, 2^55212322540 is an apocalyptic number.

It is an amenable number.

55212322540 is an abundant number, since it is smaller than the sum of its proper divisors (60754750052).

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

55212322540 is a wasteful number, since it uses less digits than its factorization.

55212322540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504657 (or 504655 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 55212322540 its reverse (4522321255), we get a palindrome (59734643795).

The spelling of 55212322540 in words is "fifty-five billion, two hundred twelve million, three hundred twenty-two thousand, five hundred forty".