55215550140 has 24 divisors (see below), whose sum is σ = 154603540560. Its totient is φ = 14724146688.

The previous prime is 55215550109. The next prime is 55215550171. The reversal of 55215550140 is 4105551255.

It is an interprime number because it is at equal distance from previous prime (55215550109) and next prime (55215550171).

It is a congruent number.

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, 460129525 + ... + 460129644.

It is an arithmetic number, because the mean of its divisors is an integer number (6441814190).

Almost surely, 2^55215550140 is an apocalyptic number.

It is an amenable number.

55215550140 is an abundant number, since it is smaller than the sum of its proper divisors (99387990420).

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

55215550140 is a wasteful number, since it uses less digits than its factorization.

55215550140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920259181 (or 920259179 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 33.

The spelling of 55215550140 in words is "fifty-five billion, two hundred fifteen million, five hundred fifty thousand, one hundred forty".