55145333503 has 16 divisors (see below), whose sum is σ = 61015254496. Its totient is φ = 49509014400.

The previous prime is 55145333497. The next prime is 55145333539. The reversal of 55145333503 is 30533354155.

It is a cyclic number.

It is not a de Polignac number, because 55145333503 - 2²⁹ = 54608462591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55145333203) 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, 1351225 + ... + 1391437.

It is an arithmetic number, because the mean of its divisors is an integer number (3813453406).

Almost surely, 2^55145333503 is an apocalyptic number.

55145333503 is a deficient number, since it is larger than the sum of its proper divisors (5869920993).

55145333503 is a wasteful number, since it uses less digits than its factorization.

55145333503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43114.

The product of its (nonzero) digits is 202500, while the sum is 37.

Adding to 55145333503 its reverse (30533354155), we get a palindrome (85678687658).

The spelling of 55145333503 in words is "fifty-five billion, one hundred forty-five million, three hundred thirty-three thousand, five hundred three".