55551430 has 32 divisors (see below), whose sum is σ = 112039200. Its totient is φ = 19653120.

The previous prime is 55551409. The next prime is 55551437. The reversal of 55551430 is 3415555.

It is a super-2 number, since 2×55551430² = 6171922750089800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55551437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2755 + ... + 10894.

It is an arithmetic number, because the mean of its divisors is an integer number (3501225).

Almost surely, 2^55551430 is an apocalyptic number.

55551430 is an abundant number, since it is smaller than the sum of its proper divisors (56487770).

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

55551430 is a wasteful number, since it uses less digits than its factorization.

55551430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13704.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 55551430 is about 7453.2831691812. The cubic root of 55551430 is about 381.5619687862.

Adding to 55551430 its reverse (3415555), we get a palindrome (58966985).

The spelling of 55551430 in words is "fifty-five million, five hundred fifty-one thousand, four hundred thirty".