55261232 has 40 divisors (see below), whose sum is σ = 115773840. Its totient is φ = 25401600.

The previous prime is 55261231. The next prime is 55261243. The reversal of 55261232 is 23216255.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (55261231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78482 + ... + 79182.

It is an arithmetic number, because the mean of its divisors is an integer number (2894346).

Almost surely, 2^55261232 is an apocalyptic number.

55261232 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55261232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57886920).

55261232 is an abundant number, since it is smaller than the sum of its proper divisors (60512608).

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

55261232 is a wasteful number, since it uses less digits than its factorization.

55261232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1095 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 55261232 is about 7433.7898813459. The cubic root of 55261232 is about 380.8963879887.

Adding to 55261232 its reverse (23216255), we get a palindrome (78477487).

The spelling of 55261232 in words is "fifty-five million, two hundred sixty-one thousand, two hundred thirty-two".