55158757 has 4 divisors (see below), whose sum is σ = 55529100. Its totient is φ = 54788416.

The previous prime is 55158751. The next prime is 55158769. The reversal of 55158757 is 75785155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75785155 = 5 ⋅15157031.

It can be written as a sum of positive squares in 2 ways, for example, as 35034561 + 20124196 = 5919^2 + 4486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55158757 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 (55158751) 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, 184948 + ... + 185245.

It is an arithmetic number, because the mean of its divisors is an integer number (13882275).

Almost surely, 2^55158757 is an apocalyptic number.

It is an amenable number.

55158757 is a deficient number, since it is larger than the sum of its proper divisors (370343).

55158757 is a wasteful number, since it uses less digits than its factorization.

55158757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370342.

The product of its digits is 245000, while the sum is 43.

The square root of 55158757 is about 7426.8941691665. The cubic root of 55158757 is about 380.6608008348.

The spelling of 55158757 in words is "fifty-five million, one hundred fifty-eight thousand, seven hundred fifty-seven".