55500012 has 48 divisors (see below), whose sum is σ = 150151680. Its totient is φ = 17694864.

The previous prime is 55499993. The next prime is 55500031. The reversal of 55500012 is 21000555.

It is an interprime number because it is at equal distance from previous prime (55499993) and next prime (55500031).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 8688 + ... + 13655.

It is an arithmetic number, because the mean of its divisors is an integer number (3128160).

Almost surely, 2^55500012 is an apocalyptic number.

It is an amenable number.

55500012 is an abundant number, since it is smaller than the sum of its proper divisors (94651668).

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

55500012 is a wasteful number, since it uses less digits than its factorization.

55500012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22379 (or 22371 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 55500012 is about 7449.8330182629. The cubic root of 55500012 is about 381.4442087841. Note that the first 3 decimals are identical.

Adding to 55500012 its reverse (21000555), we get a palindrome (76500567).

The spelling of 55500012 in words is "fifty-five million, five hundred thousand, twelve".