55158277 has 4 divisors (see below), whose sum is σ = 55174240. Its totient is φ = 55142316.

The previous prime is 55158253. The next prime is 55158281. The reversal of 55158277 is 77285155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55158277 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 (55158247) 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, 393 + ... + 10510.

It is an arithmetic number, because the mean of its divisors is an integer number (13793560).

Almost surely, 2^55158277 is an apocalyptic number.

It is an amenable number.

55158277 is a deficient number, since it is larger than the sum of its proper divisors (15963).

55158277 is a wasteful number, since it uses less digits than its factorization.

55158277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15962.

The product of its digits is 98000, while the sum is 40.

The square root of 55158277 is about 7426.8618541077. The cubic root of 55158277 is about 380.6596966419.

The spelling of 55158277 in words is "fifty-five million, one hundred fifty-eight thousand, two hundred seventy-seven".