55503161 has 8 divisors (see below), whose sum is σ = 66770880. Its totient is φ = 45070128.

The previous prime is 55503157. The next prime is 55503169. The reversal of 55503161 is 16130555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55503161 - 2² = 55503157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55503161.

It is not an unprimeable number, because it can be changed into a prime (55503169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208526 + ... + 208791.

It is an arithmetic number, because the mean of its divisors is an integer number (8346360).

Almost surely, 2^55503161 is an apocalyptic number.

It is an amenable number.

55503161 is a deficient number, since it is larger than the sum of its proper divisors (11267719).

55503161 is a wasteful number, since it uses less digits than its factorization.

55503161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417343.

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

The square root of 55503161 is about 7450.0443622840. The cubic root of 55503161 is about 381.4514228672.

The spelling of 55503161 in words is "fifty-five million, five hundred three thousand, one hundred sixty-one".