55131250 has 24 divisors (see below), whose sum is σ = 103376196. Its totient is φ = 22050000.

The previous prime is 55131247. The next prime is 55131257. The reversal of 55131250 is 5213155.

55131250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 4422609 + 50708641 = 2103^2 + 7121^2 .

It is not an unprimeable number, because it can be changed into a prime (55131257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1840 + ... + 10660.

Almost surely, 2^55131250 is an apocalyptic number.

55131250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55131250 is a deficient number, since it is larger than the sum of its proper divisors (48244946).

55131250 is an frugal number, since it uses more digits than its factorization.

55131250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8848 (or 8828 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55131250 is about 7425.0420874228. The cubic root of 55131250 is about 380.5975133457.

The spelling of 55131250 in words is "fifty-five million, one hundred thirty-one thousand, two hundred fifty".