55616001 has 32 divisors (see below), whose sum is σ = 89303040. Its totient is φ = 30100224.

The previous prime is 55615991. The next prime is 55616003. The reversal of 55616001 is 10061655.

It is not a de Polignac number, because 55616001 - 2⁵ = 55615969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55616003) 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, 54070 + ... + 55088.

It is an arithmetic number, because the mean of its divisors is an integer number (2790720).

Almost surely, 2^55616001 is an apocalyptic number.

It is an amenable number.

55616001 is a deficient number, since it is larger than the sum of its proper divisors (33687039).

55616001 is a wasteful number, since it uses less digits than its factorization.

55616001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 55616001 is about 7457.6136263553. The cubic root of 55616001 is about 381.7097495484.

Adding to 55616001 its reverse (10061655), we get a palindrome (65677656).

The spelling of 55616001 in words is "fifty-five million, six hundred sixteen thousand, one".