55145506 has 8 divisors (see below), whose sum is σ = 89081244. Its totient is φ = 25451760.

The previous prime is 55145491. The next prime is 55145507. The reversal of 55145506 is 60554155.

It can be written as a sum of positive squares in 2 ways, for example, as 53802225 + 1343281 = 7335^2 + 1159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55145507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060465 + ... + 1060516.

Almost surely, 2^55145506 is an apocalyptic number.

55145506 is a deficient number, since it is larger than the sum of its proper divisors (33935738).

55145506 is a wasteful number, since it uses less digits than its factorization.

55145506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120996.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 55145506 is about 7426.0020199297. The cubic root of 55145506 is about 380.6303158582.

The spelling of 55145506 in words is "fifty-five million, one hundred forty-five thousand, five hundred six".