55221355142503 has 16 divisors (see below), whose sum is σ = 60688310417280. Its totient is φ = 49829031885600.

The previous prime is 55221355142491. The next prime is 55221355142533. The reversal of 55221355142503 is 30524155312255.

It is not a de Polignac number, because 55221355142503 - 2¹³ = 55221355134311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55221355142503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55221355142533) 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, 2908708 + ... + 10904278.

It is an arithmetic number, because the mean of its divisors is an integer number (3793019401080).

Almost surely, 2^{55221355142503} is an apocalyptic number.

55221355142503 is a deficient number, since it is larger than the sum of its proper divisors (5466955274777).

55221355142503 is a wasteful number, since it uses less digits than its factorization.

55221355142503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8000238.

The product of its (nonzero) digits is 900000, while the sum is 43.

The spelling of 55221355142503 in words is "fifty-five trillion, two hundred twenty-one billion, three hundred fifty-five million, one hundred forty-two thousand, five hundred three".