55511601 has 4 divisors (see below), whose sum is σ = 74015472. Its totient is φ = 37007732.

The previous prime is 55511587. The next prime is 55511611. The reversal of 55511601 is 10611555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55511601 - 2⁵ = 55511569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55511611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9251931 + ... + 9251936.

It is an arithmetic number, because the mean of its divisors is an integer number (18503868).

Almost surely, 2^55511601 is an apocalyptic number.

It is an amenable number.

55511601 is a deficient number, since it is larger than the sum of its proper divisors (18503871).

55511601 is a wasteful number, since it uses less digits than its factorization.

55511601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18503870.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 55511601 is about 7450.6107803320. The cubic root of 55511601 is about 381.4707568221.

The spelling of 55511601 in words is "fifty-five million, five hundred eleven thousand, six hundred one".