55275012 has 72 divisors (see below), whose sum is σ = 152390784. Its totient is φ = 16790976.

The previous prime is 55275001. The next prime is 55275013. The reversal of 55275012 is 21057255.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55275013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38133 + ... + 39555.

Almost surely, 2^55275012 is an apocalyptic number.

55275012 is a gapful number since it is divisible by the number (52) 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 55275012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76195392).

55275012 is an abundant number, since it is smaller than the sum of its proper divisors (97115772).

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

55275012 is a wasteful number, since it uses less digits than its factorization.

55275012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 55275012 is about 7434.7166724765. The cubic root of 55275012 is about 380.9280456012.

The spelling of 55275012 in words is "fifty-five million, two hundred seventy-five thousand, twelve".