55151210215550 has 96 divisors (see below), whose sum is σ = 104240643171840. Its totient is φ = 21705148108800.

The previous prime is 55151210215537. The next prime is 55151210215567. The reversal of 55151210215550 is 5551201215155.

It is a congruent number.

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, 4257787874 + ... + 4257800826.

It is an arithmetic number, because the mean of its divisors is an integer number (1085840033040).

Almost surely, 2^{55151210215550} is an apocalyptic number.

55151210215550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55151210215550 is a deficient number, since it is larger than the sum of its proper divisors (49089432956290).

55151210215550 is a wasteful number, since it uses less digits than its factorization.

55151210215550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15798 (or 15793 counting only the distinct ones).

The product of its (nonzero) digits is 62500, while the sum is 38.

The spelling of 55151210215550 in words is "fifty-five trillion, one hundred fifty-one billion, two hundred ten million, two hundred fifteen thousand, five hundred fifty".