55131472 has 30 divisors (see below), whose sum is σ = 117414794. Its totient is φ = 25058880.

The previous prime is 55131469. The next prime is 55131473. The reversal of 55131472 is 27413155.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45914176 + 9217296 = 6776^2 + 3036^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55131472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55131473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12303 + ... + 16174.

Almost surely, 2^55131472 is an apocalyptic number.

It is an amenable number.

55131472 is an abundant number, since it is smaller than the sum of its proper divisors (62283322).

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

55131472 is a wasteful number, since it uses less digits than its factorization.

55131472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28507 (or 28490 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 55131472 is about 7425.0570368180. The cubic root of 55131472 is about 380.5980242026.

It can be divided in two parts, 551 and 31472, that added together give a palindrome (32023).

The spelling of 55131472 in words is "fifty-five million, one hundred thirty-one thousand, four hundred seventy-two".