55509157 has 8 divisors (see below), whose sum is σ = 60629472. Its totient is φ = 50401200.

The previous prime is 55509151. The next prime is 55509163. The reversal of 55509157 is 75190555.

It is an interprime number because it is at equal distance from previous prime (55509151) and next prime (55509163).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55509157 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 (55509151) 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 7 ways as a sum of consecutive naturals, for example, 8083 + ... + 13279.

It is an arithmetic number, because the mean of its divisors is an integer number (7578684).

Almost surely, 2^55509157 is an apocalyptic number.

It is an amenable number.

55509157 is a deficient number, since it is larger than the sum of its proper divisors (5120315).

55509157 is a wasteful number, since it uses less digits than its factorization.

55509157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6179.

The product of its (nonzero) digits is 39375, while the sum is 37.

The square root of 55509157 is about 7450.4467651276. The cubic root of 55509157 is about 381.4651584235.

The spelling of 55509157 in words is "fifty-five million, five hundred nine thousand, one hundred fifty-seven".