55130625 has 105 divisors (see below), whose sum is σ = 113533189. Its totient is φ = 26730000.

The previous prime is 55130611. The next prime is 55130627. The reversal of 55130625 is 52603155.

The square root of 55130625 is 7425.

It is a perfect power (a square), and thus also a powerful number.

55130625 is a `hidden beast` number, since 5 + 5 + 1 + 30 + 625 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4322241 + 50808384 = 2079^2 + 7128^2 .

It is not a de Polignac number, because 55130625 - 2⁷ = 55130497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55130627) by changing a digit.

It is a polite number, since it can be written in 104 ways as a sum of consecutive naturals, for example, 5011870 + ... + 5011880.

Almost surely, 2^55130625 is an apocalyptic number.

55130625 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55130625 is the 7425-th square number.

55130625 is the 3713-rd centered octagonal number.

It is an amenable number.

55130625 is an abundant number, since it is smaller than the sum of its proper divisors (58402564).

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

55130625 is an frugal number, since it uses more digits than its factorization.

55130625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 19 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The cubic root of 55130625 is about 380.5960751152.

It can be divided in two parts, 55130 and 625, that added together give a palindrome (55755).

The spelling of 55130625 in words is "fifty-five million, one hundred thirty thousand, six hundred twenty-five".