55161503 has 16 divisors (see below), whose sum is σ = 59781120. Its totient is φ = 50733216.

The previous prime is 55161473. The next prime is 55161553. The reversal of 55161503 is 30516155.

It is a cyclic number.

It is not a de Polignac number, because 55161503 - 2⁸ = 55161247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55161553) 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, 199001 + ... + 199277.

It is an arithmetic number, because the mean of its divisors is an integer number (3736320).

Almost surely, 2^55161503 is an apocalyptic number.

55161503 is a deficient number, since it is larger than the sum of its proper divisors (4619617).

55161503 is a wasteful number, since it uses less digits than its factorization.

55161503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 55161503 is about 7427.0790355294. The cubic root of 55161503 is about 380.6671176149.

Adding to 55161503 its reverse (30516155), we get a palindrome (85677658).

The spelling of 55161503 in words is "fifty-five million, one hundred sixty-one thousand, five hundred three".