55616145 has 32 divisors (see below), whose sum is σ = 97168512.
Its totient is φ = 26998272.
The previous prime is 55616137. The next prime is 55616147. The reversal of 55616145 is 54161655.
It is not a de Polignac number, because 55616145 - 23 = 55616137 is a prime.
It is a super-2 number, since 2×556161452 = 6186311169322050, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (55616147) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12282 + ... + 16188.
It is an arithmetic number, because the mean of its divisors is an integer number (3036516).
Almost surely, 255616145 is an apocalyptic number.
It is an amenable number.
55616145 is a deficient number, since it is larger than the sum of its proper divisors (41552367).
55616145 is a wasteful number, since it uses less digits than its factorization.
55616145 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4001.
The product of its digits is 18000, while the sum is 33.
The square root of 55616145 is about 7457.6232809120.
The cubic root of 55616145 is about 381.7100789869.
The spelling of 55616145 in words is "fifty-five million, six hundred sixteen thousand, one hundred forty-five".