55505357 has 4 divisors (see below), whose sum is σ = 58770396. Its totient is φ = 52240320.

The previous prime is 55505353. The next prime is 55505377. The reversal of 55505357 is 75350555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20529961 + 34975396 = 4531^2 + 5914^2 .

It is not a de Polignac number, because 55505357 - 2² = 55505353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1632494 + ... + 1632527.

It is an arithmetic number, because the mean of its divisors is an integer number (14692599).

Almost surely, 2^55505357 is an apocalyptic number.

It is an amenable number.

55505357 is a deficient number, since it is larger than the sum of its proper divisors (3265039).

55505357 is a wasteful number, since it uses less digits than its factorization.

55505357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265038.

The product of its (nonzero) digits is 65625, while the sum is 35.

The square root of 55505357 is about 7450.1917424990. The cubic root of 55505357 is about 381.4564535493.

The spelling of 55505357 in words is "fifty-five million, five hundred five thousand, three hundred fifty-seven".