55130432 has 28 divisors (see below), whose sum is σ = 125028960. Its totient is φ = 23627136.

The previous prime is 55130423. The next prime is 55130443. The reversal of 55130432 is 23403155.

It is a tau number, because it is divible by the number of its divisors (28).

It is a junction number, because it is equal to n+sod(n) for n = 55130398 and 55130407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61082 + ... + 61977.

It is an arithmetic number, because the mean of its divisors is an integer number (4465320).

Almost surely, 2^55130432 is an apocalyptic number.

It is an amenable number.

55130432 is an abundant number, since it is smaller than the sum of its proper divisors (69898528).

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

55130432 is a wasteful number, since it uses less digits than its factorization.

55130432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123078 (or 123068 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 55130432 is about 7424.9870033556. The cubic root of 55130432 is about 380.5956309874.

Adding to 55130432 its reverse (23403155), we get a palindrome (78533587).

The spelling of 55130432 in words is "fifty-five million, one hundred thirty thousand, four hundred thirty-two".