55873581 has 8 divisors (see below), whose sum is σ = 75194784. Its totient is φ = 36900720.

The previous prime is 55873579. The next prime is 55873583. The reversal of 55873581 is 18537855.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55873579) and next prime (55873583).

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

It is not a de Polignac number, because 55873581 - 2¹ = 55873579 is a prime.

It is a super-2 number, since 2×55873581² = 6243714107527122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55873583) 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, 86710 + ... + 87351.

It is an arithmetic number, because the mean of its divisors is an integer number (9399348).

Almost surely, 2^55873581 is an apocalyptic number.

It is an amenable number.

55873581 is a deficient number, since it is larger than the sum of its proper divisors (19321203).

55873581 is a wasteful number, since it uses less digits than its factorization.

55873581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174171.

The product of its digits is 168000, while the sum is 42.

The square root of 55873581 is about 7474.8632763416. The cubic root of 55873581 is about 382.2981257782.

The spelling of 55873581 in words is "fifty-five million, eight hundred seventy-three thousand, five hundred eighty-one".