55551132 has 144 divisors (see below), whose sum is σ = 178726912. Its totient is φ = 14152320.

The previous prime is 55551127. The next prime is 55551137. The reversal of 55551132 is 23115555.

It is an interprime number because it is at equal distance from previous prime (55551127) and next prime (55551137).

It is a junction number, because it is equal to n+sod(n) for n = 55551096 and 55551105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55551137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101283 + ... + 101829.

Almost surely, 2^55551132 is an apocalyptic number.

55551132 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 55551132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89363456).

55551132 is an abundant number, since it is smaller than the sum of its proper divisors (123175780).

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

55551132 is a wasteful number, since it uses less digits than its factorization.

55551132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 603 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 55551132 is about 7453.2631779644. The cubic root of 55551132 is about 381.5612865015.

Adding to 55551132 its reverse (23115555), we get a palindrome (78666687).

The spelling of 55551132 in words is "fifty-five million, five hundred fifty-one thousand, one hundred thirty-two".