55401330 has 16 divisors (see below), whose sum is σ = 132963264. Its totient is φ = 14773680.

The previous prime is 55401299. The next prime is 55401383. The reversal of 55401330 is 3310455.

It is a junction number, because it is equal to n+sod(n) for n = 55401297 and 55401306.

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, 923326 + ... + 923385.

It is an arithmetic number, because the mean of its divisors is an integer number (8310204).

Almost surely, 2^55401330 is an apocalyptic number.

55401330 is an abundant number, since it is smaller than the sum of its proper divisors (77561934).

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

55401330 is a wasteful number, since it uses less digits than its factorization.

55401330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846721.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 55401330 is about 7443.2069701171. The cubic root of 55401330 is about 381.2179985681.

Adding to 55401330 its reverse (3310455), we get a palindrome (58711785).

The spelling of 55401330 in words is "fifty-five million, four hundred one thousand, three hundred thirty".