55525145 has 32 divisors (see below), whose sum is σ = 76839840. Its totient is φ = 38154240.

The previous prime is 55525139. The next prime is 55525147. The reversal of 55525145 is 54152555.

It can be written as a sum of positive squares in 16 ways, for example, as 12845056 + 42680089 = 3584^2 + 6533^2 .

It is not a de Polignac number, because 55525145 - 2⁶ = 55525081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55525147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120215 + ... + 120675.

It is an arithmetic number, because the mean of its divisors is an integer number (2401245).

Almost surely, 2^55525145 is an apocalyptic number.

It is an amenable number.

55525145 is a deficient number, since it is larger than the sum of its proper divisors (21314695).

55525145 is a wasteful number, since it uses less digits than its factorization.

55525145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605.

The product of its digits is 25000, while the sum is 32.

The square root of 55525145 is about 7451.5196436700. The cubic root of 55525145 is about 381.5017786848.

The spelling of 55525145 in words is "fifty-five million, five hundred twenty-five thousand, one hundred forty-five".