55158261 has 8 divisors (see below), whose sum is σ = 76080480. Its totient is φ = 35504112.

The previous prime is 55158253. The next prime is 55158281. The reversal of 55158261 is 16285155.

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

It is not a de Polignac number, because 55158261 - 2³ = 55158253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55158211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316915 + ... + 317088.

It is an arithmetic number, because the mean of its divisors is an integer number (9510060).

Almost surely, 2^55158261 is an apocalyptic number.

It is an amenable number.

55158261 is a deficient number, since it is larger than the sum of its proper divisors (20922219).

55158261 is a wasteful number, since it uses less digits than its factorization.

55158261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634035.

The product of its digits is 12000, while the sum is 33.

The square root of 55158261 is about 7426.8607769366. The cubic root of 55158261 is about 380.6596598354.

The spelling of 55158261 in words is "fifty-five million, one hundred fifty-eight thousand, two hundred sixty-one".