55258572 has 48 divisors (see below), whose sum is σ = 134840160. Its totient is φ = 17590272.

The previous prime is 55258571. The next prime is 55258583. The reversal of 55258572 is 27585255.

It is a self number, because there is not a number n which added to its sum of digits gives 55258572.

It is not an unprimeable number, because it can be changed into a prime (55258571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32938 + ... + 34574.

It is an arithmetic number, because the mean of its divisors is an integer number (2809170).

Almost surely, 2^55258572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55258572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67420080).

55258572 is an abundant number, since it is smaller than the sum of its proper divisors (79581588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55258572 is a wasteful number, since it uses less digits than its factorization.

55258572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770 (or 1768 counting only the distinct ones).

The product of its digits is 140000, while the sum is 39.

The square root of 55258572 is about 7433.6109664146. The cubic root of 55258572 is about 380.8902764067.

The spelling of 55258572 in words is "fifty-five million, two hundred fifty-eight thousand, five hundred seventy-two".