55513161 has 32 divisors (see below), whose sum is σ = 90134400. Its totient is φ = 33488640.

The previous prime is 55513153. The next prime is 55513181. The reversal of 55513161 is 16131555.

It is not a de Polignac number, because 55513161 - 2³ = 55513153 is a prime.

It is a super-2 number, since 2×55513161² = 6163422088423842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55513121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121245 + ... + 121701.

It is an arithmetic number, because the mean of its divisors is an integer number (2816700).

Almost surely, 2^55513161 is an apocalyptic number.

It is an amenable number.

55513161 is a deficient number, since it is larger than the sum of its proper divisors (34621239).

55513161 is a wasteful number, since it uses less digits than its factorization.

55513161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 880 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 55513161 is about 7450.7154690003. The cubic root of 55513161 is about 381.4743301822.

The spelling of 55513161 in words is "fifty-five million, five hundred thirteen thousand, one hundred sixty-one".