55431024 has 80 divisors (see below), whose sum is σ = 157192320. Its totient is φ = 16692480.

The previous prime is 55431011. The next prime is 55431041. The reversal of 55431024 is 42013455.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 55430985 and 55431003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146067 + ... + 146445.

It is an arithmetic number, because the mean of its divisors is an integer number (1964904).

Almost surely, 2^55431024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55431024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78596160).

55431024 is an abundant number, since it is smaller than the sum of its proper divisors (101761296).

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

55431024 is a wasteful number, since it uses less digits than its factorization.

55431024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 55431024 is about 7445.2014076182. The cubic root of 55431024 is about 381.2860947999.

Adding to 55431024 its reverse (42013455), we get a palindrome (97444479).

Subtracting from 55431024 its reverse (42013455), we obtain a square (13417569 = 3663²).

The spelling of 55431024 in words is "fifty-five million, four hundred thirty-one thousand, twenty-four".