55311530 has 16 divisors (see below), whose sum is σ = 99944064. Its totient is φ = 22039440.

The previous prime is 55311517. The next prime is 55311541. The reversal of 55311530 is 3511355.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55311496 and 55311505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7886 + ... + 13145.

It is an arithmetic number, because the mean of its divisors is an integer number (6246504).

Almost surely, 2^55311530 is an apocalyptic number.

55311530 is a deficient number, since it is larger than the sum of its proper divisors (44632534).

55311530 is a wasteful number, since it uses less digits than its factorization.

55311530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21301.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 55311530 is about 7437.1721776492. The cubic root of 55311530 is about 381.0119151327.

Adding to 55311530 its reverse (3511355), we get a palindrome (58822885).

The spelling of 55311530 in words is "fifty-five million, three hundred eleven thousand, five hundred thirty".