55007550 has 72 divisors (see below), whose sum is σ = 159172104. Its totient is φ = 13538880.

The previous prime is 55007549. The next prime is 55007551. The reversal of 55007550 is 5570055.

It is an interprime number because it is at equal distance from previous prime (55007549) and next prime (55007551).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55007551) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1149 + ... + 10551.

Almost surely, 2^55007550 is an apocalyptic number.

55007550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55007550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79586052).

55007550 is an abundant number, since it is smaller than the sum of its proper divisors (104164554).

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

55007550 is a wasteful number, since it uses less digits than its factorization.

55007550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9434 (or 9426 counting only the distinct ones).

The product of its (nonzero) digits is 4375, while the sum is 27.

The square root of 55007550 is about 7416.7074905243. The cubic root of 55007550 is about 380.3126466685.

The spelling of 55007550 in words is "fifty-five million, seven thousand, five hundred fifty".