55530310 has 16 divisors (see below), whose sum is σ = 109041552. Its totient is φ = 20192800.

The previous prime is 55530301. The next prime is 55530317. The reversal of 55530310 is 1303555.

It is a happy number.

It is a super-2 number, since 2×55530310² = 6167230657392200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530317) 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, 252301 + ... + 252520.

It is an arithmetic number, because the mean of its divisors is an integer number (6815097).

Almost surely, 2^55530310 is an apocalyptic number.

55530310 is a deficient number, since it is larger than the sum of its proper divisors (53511242).

55530310 is a wasteful number, since it uses less digits than its factorization.

55530310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504839.

The product of its (nonzero) digits is 1125, while the sum is 22.

The square root of 55530310 is about 7451.8662092123. The cubic root of 55530310 is about 381.5136075334.

Adding to 55530310 its reverse (1303555), we get a palindrome (56833865).

The spelling of 55530310 in words is "fifty-five million, five hundred thirty thousand, three hundred ten".