55059561 has 8 divisors (see below), whose sum is σ = 81569760. Its totient is φ = 36706356.

The previous prime is 55059551. The next prime is 55059569. The reversal of 55059561 is 16595055.

55059561 is a `hidden beast` number, since 5 + 5 + 0 + 595 + 61 = 666.

It is not a de Polignac number, because 55059561 - 2¹³ = 55051369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55059569) 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, 1019595 + ... + 1019648.

It is an arithmetic number, because the mean of its divisors is an integer number (10196220).

Almost surely, 2^55059561 is an apocalyptic number.

It is an amenable number.

55059561 is a deficient number, since it is larger than the sum of its proper divisors (26510199).

55059561 is a wasteful number, since it uses less digits than its factorization.

55059561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039252 (or 2039246 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 36.

The square root of 55059561 is about 7420.2130023336. The cubic root of 55059561 is about 380.4324739167.

The spelling of 55059561 in words is "fifty-five million, fifty-nine thousand, five hundred sixty-one".