55625000 has 64 divisors (see below), whose sum is σ = 131835600. Its totient is φ = 22000000.

The previous prime is 55624999. The next prime is 55625029. The reversal of 55625000 is 52655.

It can be written as a sum of positive squares in 8 ways, for example, as 54789604 + 835396 = 7402^2 + 914^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624956 + ... + 625044.

Almost surely, 2^55625000 is an apocalyptic number.

55625000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55625000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65917800).

55625000 is an abundant number, since it is smaller than the sum of its proper divisors (76210600).

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

55625000 is an frugal number, since it uses more digits than its factorization.

55625000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55625000 is about 7458.2169450881. The cubic root of 55625000 is about 381.7303360746.

Adding to 55625000 its reverse (52655), we get a palindrome (55677655).

The spelling of 55625000 in words is "fifty-five million, six hundred twenty-five thousand".