55312450 has 12 divisors (see below), whose sum is σ = 102881250. Its totient is φ = 22124960.

The previous prime is 55312429. The next prime is 55312451. The reversal of 55312450 is 5421355.

It can be written as a sum of positive squares in 3 ways, for example, as 50737129 + 4575321 = 7123^2 + 2139^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (55312451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 553075 + ... + 553174.

Almost surely, 2^55312450 is an apocalyptic number.

55312450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55312450 is a deficient number, since it is larger than the sum of its proper divisors (47568800).

55312450 is a wasteful number, since it uses less digits than its factorization.

55312450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106261 (or 1106256 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55312450 is about 7437.2340288578. The cubic root of 55312450 is about 381.0140275857.

The spelling of 55312450 in words is "fifty-five million, three hundred twelve thousand, four hundred fifty".