55555530 has 16 divisors (see below), whose sum is σ = 133333344. Its totient is φ = 14814800.

The previous prime is 55555523. The next prime is 55555531. The reversal of 55555530 is 3555555.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 55555491 and 55555500.

It is not an unprimeable number, because it can be changed into a prime (55555531) 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, 925896 + ... + 925955.

It is an arithmetic number, because the mean of its divisors is an integer number (8333334).

Almost surely, 2^55555530 is an apocalyptic number.

55555530 is an abundant number, since it is smaller than the sum of its proper divisors (77777814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55555530 is a wasteful number, since it uses less digits than its factorization.

55555530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851861.

The product of its (nonzero) digits is 46875, while the sum is 33.

The square root of 55555530 is about 7453.5582106803. The cubic root of 55555530 is about 381.5713556768.

The spelling of 55555530 in words is "fifty-five million, five hundred fifty-five thousand, five hundred thirty".