55145245 has 8 divisors (see below), whose sum is σ = 66304440. Its totient is φ = 44029440.

The previous prime is 55145213. The next prime is 55145291. The reversal of 55145245 is 54254155.

It can be written as a sum of positive squares in 4 ways, for example, as 13697401 + 41447844 = 3701^2 + 6438^2 .

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

It is not a de Polignac number, because 55145245 - 2⁵ = 55145213 is a prime.

It is a super-2 number, since 2×55145245² = 6081996092220050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7980 + ... + 13189.

It is an arithmetic number, because the mean of its divisors is an integer number (8288055).

Almost surely, 2^55145245 is an apocalyptic number.

It is an amenable number.

55145245 is a deficient number, since it is larger than the sum of its proper divisors (11159195).

55145245 is a wasteful number, since it uses less digits than its factorization.

55145245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21695.

The product of its digits is 20000, while the sum is 31.

The square root of 55145245 is about 7425.9844465229. The cubic root of 55145245 is about 380.6297153579.

It can be divided in two parts, 551 and 45245, that added together give a square (45796 = 214²).

The spelling of 55145245 in words is "fifty-five million, one hundred forty-five thousand, two hundred forty-five".